All the tests are green

MathUtilities.java

@@ -11,7 +11,7 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Integer add(int baseValue, int difference) {
-        return null;
+        return baseValue + difference;
     }
 
     /**
@@ -20,7 +20,7 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Long add(long baseValue, long difference) {
-        return null;
+        return baseValue + difference;
     }
 
     /**
@@ -29,7 +29,7 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Short add(short baseValue, short difference) {
-        return null;
+        return (short) (baseValue + difference);
     }
 
     /**
@@ -38,7 +38,7 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Byte add(byte baseValue, byte difference) {
-        return null;
+        return (byte) (baseValue + difference);
     }
 
     /**
@@ -47,7 +47,7 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Float add(float baseValue, float difference) {
-        return null;
+        return baseValue + difference;
     }
 
     /**
@@ -56,7 +56,7 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Double add(double baseValue, double difference) {
-        return null;
+        return baseValue + difference;
     }
 
     /**
@@ -65,7 +65,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Integer subtract(int baseValue, int difference) {
-        return null;
+        return baseValue - difference;
     }
 
     /**
@@ -74,7 +74,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Long subtract(long baseValue, long difference) {
-        return null;
+        return baseValue - difference;
     }
 
     /**
@@ -83,7 +83,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Short subtract(short baseValue, short difference) {
-        return null;
+        return (short) (baseValue - difference);
     }
 
     /**
@@ -92,7 +92,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Byte subtract(byte baseValue, byte difference) {
-        return null;
+        return (byte) (baseValue - difference);
     }
 
     /**
@@ -101,7 +101,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Float subtract(float baseValue, float difference) {
-        return null;
+        return baseValue - difference;
     }
 
     /**
@@ -110,7 +110,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Double subtract(double baseValue, double difference) {
-        return null;
+        return baseValue - difference;
     }
 
 
@@ -120,7 +120,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Integer divide(int dividend, int divisor) {
-        return null;
+        return dividend/divisor;
     }
 
     /**
@@ -129,7 +129,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Long divide(long dividend, long divisor) {
-        return null;
+        return dividend/divisor;
     }
 
     /**
@@ -138,7 +138,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Short divide(short dividend, short divisor) {
-        return null;
+        return (short) (dividend/divisor);
     }
 
     /**
@@ -147,7 +147,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Byte divide(byte dividend, byte divisor) {
-        return null;
+        return (byte) (dividend/divisor);
     }
 
     /**
@@ -156,7 +156,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Float divide(float dividend, float divisor) {
-        return null;
+        return dividend/divisor;
     }
 
     /**
@@ -165,7 +165,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Double divide(double dividend, double divisor) {
-        return null;
+        return dividend/divisor;
     }
 
 
@@ -175,7 +175,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Integer multiply(int multiplicand, int multiplier) {
-        return null;
+        return multiplicand*multiplier;
     }
 
     /**
@@ -184,7 +184,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Long multiply(long multiplicand, long multiplier) {
-        return null;
+        return multiplicand*multiplier;
     }
 
     /**
@@ -193,7 +193,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Short multiply(short multiplicand, short multiplier) {
-        return null;
+        return (short) (multiplicand*multiplier);
     }
     /**
      * @param multiplicand value to be multiplied
@@ -201,7 +201,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Byte multiply(byte multiplicand, byte multiplier) {
-        return null;
+        return (byte) (multiplicand*multiplier);
     }
 
     /**
@@ -210,7 +210,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Float multiply(float multiplicand, float multiplier) {
-        return null;
+        return multiplicand*multiplier;
     }
 
     /**
@@ -219,7 +219,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Double multiply(double multiplicand, double multiplier) {
-        return null;
+        return multiplicand*multiplier;
     }
 
 
@@ -227,14 +227,14 @@ public class MathUtilities {
       * @return true
      */
     public Boolean returnTrue() {
-        return null;
+        return true;
     }
 
     /**
      * @return false
      */
     public Boolean returnFalse() {
-        return null;
+        return false;
     }
 
 }

PredicateUtilities.java

@@ -10,7 +10,8 @@ public class PredicateUtilities {
      * @return true if `x` is greater than `y`
      */
     public Boolean isGreaterThan(int x, int y) {
-        return null;
+        Boolean z = x > y ? true : false;
+        return z;
     }
 
     /**
@@ -19,7 +20,8 @@ public class PredicateUtilities {
      * @return true if `x` is less than `y`
      */
     public Boolean isLessThan(int x, int y) {
-        return null;
+        Boolean z = x < y ? true : false;
+        return z;
     }
 
     /**
@@ -28,7 +30,8 @@ public class PredicateUtilities {
      * @return true if `x` is greater than or equal to `y`
      */
     public Boolean isGreaterThanOrEqualTo(int x, int y) {
-        return null;
+        Boolean z = x >= y ? true : false;
+        return z;
     }
 
     /**
@@ -37,6 +40,7 @@ public class PredicateUtilities {
      * @return true if `x` is less than or equal to `y`
      */
     public Boolean isLessThanOrEqualTo(int x, int y) {
-        return null;
+        Boolean z = x <= y ? true : false;
+        return z;
     }
 }

StringUtilities.ctxt

@@ -1,6 +1,5 @@
 #BlueJ class context
 comment0.target=StringUtilities
-comment0.text=\n\ Created\ by\ dan\ on\ 6/14/17.\n
 comment1.params=
 comment1.target=java.lang.String\ getHelloWorld()
 comment1.text=\n\ @return\ `Hello\ World`\ as\ a\ string\n

StringUtilities.java

@@ -3,12 +3,15 @@
 /**
  * Created by dan on 6/14/17.
  */
+import java.util.*;
+import java.lang.*;
 public class StringUtilities {
     /**
      * @return `Hello World` as a string
      */
     public static String getHelloWorld() {
-        return null;
+        String str = "Hello World";
+        return str;
     }
 
     /**
@@ -17,7 +20,8 @@ public class StringUtilities {
      * @return the concatenation of two strings, `firstSegment`, and `secondSegment`
      */
     public static String concatenation(String firstSegment, String secondSegment){
-        return null;
+        String str = firstSegment + secondSegment;
+        return str;
     }
 
     /**
@@ -26,7 +30,8 @@ public class StringUtilities {
      * @return the concatenation of an integer, `firstSegment`, and a String, `secondSegment`
      */
     public static String concatenation(int firstSegment, String secondSegment){
-        return null;
+        String str = firstSegment + secondSegment;
+        return str;
     }
 
     /**
@@ -34,7 +39,7 @@ public class StringUtilities {
      * @return the first 3 characters of `input`
      */
     public static String getPrefix(String input){
-        return null;
+        return input.substring(0,3);
     }
 
     /**
@@ -42,7 +47,8 @@ public class StringUtilities {
      * @return the last 3 characters of `input`
      */
     public static String getSuffix(String input){
-        return null;
+        int z = input.length() - 3;
+        return input.substring(z);
     }
 
     /**
@@ -51,7 +57,9 @@ public class StringUtilities {
      * @return the equivalence of two strings, `inputValue` and `comparableValue`
      */
     public static Boolean compareTwoStrings(String inputValue, String comparableValue){
-        return null;
+        if (inputValue.equals(comparableValue)) 
+        {return true;}
+        return false;
     }
 
     /**
@@ -59,7 +67,8 @@ public class StringUtilities {
      * @return the middle character of `inputValue`
      */
     public static Character getMiddleCharacter(String inputValue){
-        return null;
+        int avg = inputValue.length()%2 == 0 ? inputValue.length()/2-1 : inputValue.length()/2;
+        return inputValue.charAt(avg);
     }
 
     /**
@@ -67,7 +76,9 @@ public class StringUtilities {
      * @return the first sequence of characters
      */
     public static String getFirstWord(String spaceDelimitedString){
-        return null;
+        int x = spaceDelimitedString.indexOf(' ');
+        String str = spaceDelimitedString.substring(0,x);
+        return str;
     }
 
     /**
@@ -75,7 +86,9 @@ public class StringUtilities {
      * @return the second word of a string delimited by spaces.
      */
     public static String getSecondWord(String spaceDelimitedString){
-        return null;
+        int x = spaceDelimitedString.indexOf(' ');
+        String str = spaceDelimitedString.substring(x+1);
+        return str;
     }
 
     /**
@@ -83,6 +96,7 @@ public class StringUtilities {
      * @return an identical string with characters in reverse order.
      */
     public static String reverse(String stringToReverse){
-        return null;
+        String str = new StringBuilder(stringToReverse).reverse().toString();
+        return str;
     }
 }

doc/MathUtilities.html

@@ -0,0 +1,697 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<!-- NewPage -->
+<html lang="en">
+<head>
+<!-- Generated by javadoc (1.8.0_181) on Thu Oct 18 16:04:13 EDT 2018 -->
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>MathUtilities</title>
+<meta name="date" content="2018-10-18">
+<link rel="stylesheet" type="text/css" href="stylesheet.css" title="Style">
+<script type="text/javascript" src="script.js"></script>
+</head>
+<body>
+<script type="text/javascript"><!--
+    try {
+        if (location.href.indexOf('is-external=true') == -1) {
+            parent.document.title="MathUtilities";
+        }
+    }
+    catch(err) {
+    }
+//-->
+var methods = {"i0":10,"i1":10,"i2":10,"i3":10,"i4":10,"i5":10,"i6":10,"i7":10,"i8":10,"i9":10,"i10":10,"i11":10,"i12":10,"i13":10,"i14":10,"i15":10,"i16":10,"i17":10,"i18":10,"i19":10,"i20":10,"i21":10,"i22":10,"i23":10,"i24":10,"i25":10};
+var tabs = {65535:["t0","All Methods"],2:["t2","Instance Methods"],8:["t4","Concrete Methods"]};
+var altColor = "altColor";
+var rowColor = "rowColor";
+var tableTab = "tableTab";
+var activeTableTab = "activeTableTab";
+</script>
+<noscript>
+<div>JavaScript is disabled on your browser.</div>
+</noscript>
+<!-- ======== START OF CLASS DATA ======== -->
+<div class="header">
+<h2 title="Class MathUtilities" class="title">Class MathUtilities</h2>
+</div>
+<div class="contentContainer">
+<ul class="inheritance">
+<li>java.lang.Object</li>
+<li>
+<ul class="inheritance">
+<li>MathUtilities</li>
+</ul>
+</li>
+</ul>
+<div class="description">
+<ul class="blockList">
+<li class="blockList">
+<hr>
+<br>
+<pre>public class <span class="typeNameLabel">MathUtilities</span>
+extends java.lang.Object</pre>
+<div class="block">Created by dan on 6/14/17.</div>
+</li>
+</ul>
+</div>
+<div class="summary">
+<ul class="blockList">
+<li class="blockList">
+<!-- ======== CONSTRUCTOR SUMMARY ======== -->
+<ul class="blockList">
+<li class="blockList"><a name="constructor.summary">
+<!--   -->
+</a>
+<h3>Constructor Summary</h3>
+<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation">
+<caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
+<tr>
+<th class="colOne" scope="col">Constructor and Description</th>
+</tr>
+<tr class="altColor">
+<td class="colOne"><code><span class="memberNameLink"><a href="MathUtilities.html#MathUtilities--">MathUtilities</a></span>()</code>&nbsp;</td>
+</tr>
+</table>
+</li>
+</ul>
+<!-- ========== METHOD SUMMARY =========== -->
+<ul class="blockList">
+<li class="blockList"><a name="method.summary">
+<!--   -->
+</a>
+<h3>Method Summary</h3>
+<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
+<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
+<tr>
+<th class="colFirst" scope="col">Modifier and Type</th>
+<th class="colLast" scope="col">Method and Description</th>
+</tr>
+<tr id="i0" class="altColor">
+<td class="colFirst"><code>java.lang.Byte</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#add-byte-byte-">add</a></span>(byte&nbsp;baseValue,
+   byte&nbsp;difference)</code>&nbsp;</td>
+</tr>
+<tr id="i1" class="rowColor">
+<td class="colFirst"><code>java.lang.Double</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#add-double-double-">add</a></span>(double&nbsp;baseValue,
+   double&nbsp;difference)</code>&nbsp;</td>
+</tr>
+<tr id="i2" class="altColor">
+<td class="colFirst"><code>java.lang.Float</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#add-float-float-">add</a></span>(float&nbsp;baseValue,
+   float&nbsp;difference)</code>&nbsp;</td>
+</tr>
+<tr id="i3" class="rowColor">
+<td class="colFirst"><code>java.lang.Integer</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#add-int-int-">add</a></span>(int&nbsp;baseValue,
+   int&nbsp;difference)</code>&nbsp;</td>
+</tr>
+<tr id="i4" class="altColor">
+<td class="colFirst"><code>java.lang.Long</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#add-long-long-">add</a></span>(long&nbsp;baseValue,
+   long&nbsp;difference)</code>&nbsp;</td>
+</tr>
+<tr id="i5" class="rowColor">
+<td class="colFirst"><code>java.lang.Short</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#add-short-short-">add</a></span>(short&nbsp;baseValue,
+   short&nbsp;difference)</code>&nbsp;</td>
+</tr>
+<tr id="i6" class="altColor">
+<td class="colFirst"><code>java.lang.Byte</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#divide-byte-byte-">divide</a></span>(byte&nbsp;dividend,
+      byte&nbsp;divisor)</code>&nbsp;</td>
+</tr>
+<tr id="i7" class="rowColor">
+<td class="colFirst"><code>java.lang.Double</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#divide-double-double-">divide</a></span>(double&nbsp;dividend,
+      double&nbsp;divisor)</code>&nbsp;</td>
+</tr>
+<tr id="i8" class="altColor">
+<td class="colFirst"><code>java.lang.Float</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#divide-float-float-">divide</a></span>(float&nbsp;dividend,
+      float&nbsp;divisor)</code>&nbsp;</td>
+</tr>
+<tr id="i9" class="rowColor">
+<td class="colFirst"><code>java.lang.Integer</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#divide-int-int-">divide</a></span>(int&nbsp;dividend,
+      int&nbsp;divisor)</code>&nbsp;</td>
+</tr>
+<tr id="i10" class="altColor">
+<td class="colFirst"><code>java.lang.Long</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#divide-long-long-">divide</a></span>(long&nbsp;dividend,
+      long&nbsp;divisor)</code>&nbsp;</td>
+</tr>
+<tr id="i11" class="rowColor">
+<td class="colFirst"><code>java.lang.Short</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#divide-short-short-">divide</a></span>(short&nbsp;dividend,
+      short&nbsp;divisor)</code>&nbsp;</td>
+</tr>
+<tr id="i12" class="altColor">
+<td class="colFirst"><code>java.lang.Byte</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#multiply-byte-byte-">multiply</a></span>(byte&nbsp;multiplicand,
+        byte&nbsp;multiplier)</code>&nbsp;</td>
+</tr>
+<tr id="i13" class="rowColor">
+<td class="colFirst"><code>java.lang.Double</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#multiply-double-double-">multiply</a></span>(double&nbsp;multiplicand,
+        double&nbsp;multiplier)</code>&nbsp;</td>
+</tr>
+<tr id="i14" class="altColor">
+<td class="colFirst"><code>java.lang.Float</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#multiply-float-float-">multiply</a></span>(float&nbsp;multiplicand,
+        float&nbsp;multiplier)</code>&nbsp;</td>
+</tr>
+<tr id="i15" class="rowColor">
+<td class="colFirst"><code>java.lang.Integer</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#multiply-int-int-">multiply</a></span>(int&nbsp;multiplicand,
+        int&nbsp;multiplier)</code>&nbsp;</td>
+</tr>
+<tr id="i16" class="altColor">
+<td class="colFirst"><code>java.lang.Long</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#multiply-long-long-">multiply</a></span>(long&nbsp;multiplicand,
+        long&nbsp;multiplier)</code>&nbsp;</td>
+</tr>
+<tr id="i17" class="rowColor">
+<td class="colFirst"><code>java.lang.Short</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#multiply-short-short-">multiply</a></span>(short&nbsp;multiplicand,
+        short&nbsp;multiplier)</code>&nbsp;</td>
+</tr>
+<tr id="i18" class="altColor">
+<td class="colFirst"><code>java.lang.Boolean</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#returnFalse--">returnFalse</a></span>()</code>&nbsp;</td>
+</tr>
+<tr id="i19" class="rowColor">
+<td class="colFirst"><code>java.lang.Boolean</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#returnTrue--">returnTrue</a></span>()</code>&nbsp;</td>
+</tr>
+<tr id="i20" class="altColor">
+<td class="colFirst"><code>java.lang.Byte</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#subtract-byte-byte-">subtract</a></span>(byte&nbsp;baseValue,
+        byte&nbsp;difference)</code>&nbsp;</td>
+</tr>
+<tr id="i21" class="rowColor">
+<td class="colFirst"><code>java.lang.Double</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#subtract-double-double-">subtract</a></span>(double&nbsp;baseValue,
+        double&nbsp;difference)</code>&nbsp;</td>
+</tr>
+<tr id="i22" class="altColor">
+<td class="colFirst"><code>java.lang.Float</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#subtract-float-float-">subtract</a></span>(float&nbsp;baseValue,
+        float&nbsp;difference)</code>&nbsp;</td>
+</tr>
+<tr id="i23" class="rowColor">
+<td class="colFirst"><code>java.lang.Integer</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#subtract-int-int-">subtract</a></span>(int&nbsp;baseValue,
+        int&nbsp;difference)</code>&nbsp;</td>
+</tr>
+<tr id="i24" class="altColor">
+<td class="colFirst"><code>java.lang.Long</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#subtract-long-long-">subtract</a></span>(long&nbsp;baseValue,
+        long&nbsp;difference)</code>&nbsp;</td>
+</tr>
+<tr id="i25" class="rowColor">
+<td class="colFirst"><code>java.lang.Short</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="MathUtilities.html#subtract-short-short-">subtract</a></span>(short&nbsp;baseValue,
+        short&nbsp;difference)</code>&nbsp;</td>
+</tr>
+</table>
+<ul class="blockList">
+<li class="blockList"><a name="methods.inherited.from.class.java.lang.Object">
+<!--   -->
+</a>
+<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
+<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+<div class="details">
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+<!-- ========= CONSTRUCTOR DETAIL ======== -->
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+<li class="blockList"><a name="constructor.detail">
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+</a>
+<h3>Constructor Detail</h3>
+<a name="MathUtilities--">
+<!--   -->
+</a>
+<ul class="blockListLast">
+<li class="blockList">
+<h4>MathUtilities</h4>
+<pre>public&nbsp;MathUtilities()</pre>
+</li>
+</ul>
+</li>
+</ul>
+<!-- ============ METHOD DETAIL ========== -->
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+<li class="blockList"><a name="method.detail">
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