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: Accepted)

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static int[] charCount = new int[26];

	public static void main(String... args) throws IOException {
		final StringBuilder sb = new StringBuilder();
		final BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		while (true) {
			final int charactor = br.read();
			if (97 <= charactor && charactor <= 123) {
				charCount[charactor - 97]++;
			} else if (65 <= charactor && charactor <= 91) {
				charCount[charactor - 65]++;
			} else if (charactor == -1) {
				break;
			}
		}

		for (int i = 0; i < 26; i++) {
			sb.append(((char) (i + 97))).append(" : ").append(charCount[i]).append(i != 25 ? '\n' : "");
		}

		System.out.println(sb);
	}
}