import java.util.*;
public class Main {
  static Scanner console= new Scanner(System.in);
    public static void main(String[] args)
    {
    System.out.print("Please Enter aString ");
    System.out.println();
    String str =console.next();
    char[]third =str.toCharArray();
   for(int counter =0;counter<third.length;counter++)
   {   char letter= third[counter];
       int flage=0;
    for (int i=0; i<third.length; i++)
        {
        if (letter==third[i])  
    flage++;
        else continue;
    }
        
      
   }
        
    }
public static void counter (int x)
{
int []count= new int[x];
// this method to store the number of occurrences of each
//alphabetical letter in the string
}
public static void read (int x)
{
// this method should recive acharacter
// then update its the corresponding counter    
}
}

    public static void main(String[]t){
        System.out.println(read("othman saad"));
    }
    
    public static String read(String text){
        TreeMap<Character, Integer> map=new TreeMap<Character, Integer>();
        for(char c:text.toCharArray()){
            if(c == ' ')continue;
            else if(map.containsKey(c))map.put(c, (1+map.get(c)));
            else map.put(c, 1);
        }
        StringBuffer result=new StringBuffer();
        Iterator<Character> it=map.keySet().iterator();
        while(it.hasNext()){
            char c=it.next();
            result.append(c).append(" : ").append(map.get(c)).append("\n");
        }
        return result.toString();
    }