InitialCharacter

import java.util.Map;
import java.util.Map.Entry;
import java.util.Scanner;
import java.util.TreeMap;

public class InitialCharacter {
  public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
    Map<Character, Integer> acc = new TreeMap<Character, Integer>();
    while (in.hasNext()) {
      char c = in.next().charAt(0);
      if (!Character.isAlphabetic(c))
        continue;
      if (!Character.isLowerCase(c))
        c = Character.toLowerCase(c);
      if (acc.get(c) == null)
        acc.put(c, 0);
      acc.put(c, acc.get(c) + 1);
    }
    in.close();
    StringBuilder sb = new StringBuilder();
    for (Entry<Character, Integer> e : acc.entrySet())
      sb.append("" + e.getKey() + ": " + e.getValue() + "\n");
    System.out.print(sb);
  }
}