import java.util.*;

public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); String line = scanner.nextLine(); Map<Character, Integer> map = new LinkedHashMap<Character, Integer>();

    //write your code here......
    for(int i = 0;i<line.length();i++){
        int count = 0;
        if((line.charAt(i) >= 'A' && line.charAt(i) <= 'Z') || ((line.charAt(i) >= 'a' && line.charAt(i) <= 'z'))){
            for(int j = 0 ; j<line.length();j++){
                if(line.charAt(i) == line.charAt(j)){
                count++;
            }
                map.put(line.charAt(i),count);
        }
    }else{
            continue;
        }
}

    Set<Map.Entry<Character, Integer>> entrys = map.entrySet();
    for (Map.Entry<Character, Integer> entry : entrys) {
        System.out.println(entry.getKey() + ":" + entry.getValue());
    }
}

}