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src/main/java/rocks/zipcode/io/quiz4/collections/SimpleStringGroup.java

 package rocks.zipcode.io.quiz4.collections;
 
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Iterator;
+
 /**
  * @author leon on 11/12/2018.
  */
-public class SimpleStringGroup {
+public class SimpleStringGroup implements Iterable {
+    ArrayList<String> s = new ArrayList<>();
+
     public SimpleStringGroup() {
-        throw new UnsupportedOperationException("Method not yet implemented");
+        // throw new UnsupportedOperationException("Method not yet implemented");
     }
 
     public Integer count() {
-        return null;
+        return s.size();
     }
 
     public void insert(String string) {
+        s.add(string);
     }
 
     public Boolean has(String valueToInsert) {
-        return null;
+        if (s.contains(valueToInsert)){
+            return true;
+        }
+        return false;
     }
 
     public String fetch(int indexOfValue) {
-        return null;
+        return s.get(indexOfValue);
     }
 
     public void delete(String valueToInsert) {
+        s.remove(valueToInsert);
     }
 
     public void clear() {
+        s.clear();
+    }
+
+    @Override
+    public Iterator iterator() {
+        return s.iterator();
     }
 }