import java.util.*;
/**
* Write a description of class Bin here.
*
* @author (your name)
* @version (a version number or a date)
*/
public class Bin
{


   private Map<Integer, Integer> entries = new TreeMap();
   
   public Bin(){
   entries.put(2,0);
   entries.put(3,0);
   entries.put(4,0);
   entries.put(5,0);
   entries.put(6,0);
   entries.put(7,0);
   entries.put(8,0);
   entries.put(9,0);
   entries.put(10,0);
   entries.put(11,0);
   entries.put(12,0);
   
   }
   
   
   public void counter(Integer key){
       Integer count = entries.get(key);
       entries.put(key, count +1);
   
   }
   
   public Integer getValue(int key){
   return entries.get(key);
   }

   
}