Problem:
Counting Characters

Write a program which counts and reports the number of each alphabetical letter. Ignore the case of characters.

Input

A sentence in English is given in several lines.

Output

Prints the number of alphabetical letters in the following format:

a : The number of 'a'
b : The number of 'b'
c : The number of 'c'
.
.
z : The number of 'z'

Constraints

The number of characters in the sentence < 1200

Sample Input

This is a pen.

Sample Output

a : 1
b : 0
c : 0
d : 0
e : 1
f : 0
g : 0
h : 1
i : 2
j : 0
k : 0
l : 0
m : 0
n : 1
o : 0
p : 1
q : 0
r : 0
s : 2
t : 1
u : 0
v : 0
w : 0
x : 0
y : 0
z : 0

Solution in JAVA (judge verdict: WA: Presentation Error)

import java.io.*;

public class Main {

	public static void main(String[] args) throws IOException {
		String s;
		char a = 'a';
		int count[] = new int[26];
		BufferedReader kbd = new BufferedReader(
				new InputStreamReader(System.in));
		while ((s = kbd.readLine()) != null)
			for (int i = 0; i < s.length(); i++) {
				if (Character.isLetter(s.charAt(i)))
					count[Character.toLowerCase(s.charAt(i)) - 'a']++;
			}
		for (int i = 0; i < 26; i++)
			System.out.println(a++ + " : " + count[i]);
		System.out.println("");
	}

}