import java.util.Scanner;

import java.util.Set;

import java.util.TreeMap;

public class CalcGeWei {

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner sc = new Scanner(System.in);

// String s= new String();

String line = sc.nextLine();

TreeMap<Character,Integer> tm = new TreeMap<Character,Integer>();

char[] ch = line.toCharArray();

for(char c:ch)

{

Integer i = tm.get(c);

if(i==null)

{

tm.put(c, 1);

}

else

{

i++;

tm.put(c, i);

}

}

StringBuffer sb = new StringBuffer();

Set<Character> s1 = tm.keySet();

for(Character c2:s1)

{

sb.append(c2).append(":").append(tm.get(c2)).append("\n3");

}

//System.out.println(tm);

String result = sb.toString();

System.out.println(result);

}

}