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: Wrong Answer)

import java.util.Scanner;

public class Main {

	public static Scanner scanner = new Scanner(System.in);

	public static void main(String[] args) {

		int[] abc = new int[26];
		String input = input().toLowerCase();

		for (int i = 0; i < input.length(); i++) {

			char charNumber = input.charAt(i);

			if ('a' <= charNumber && charNumber <= 'z') {

				abc[charNumber - 'a']++;

			}
		}

		for (int j = 0; j < 26; j++) {

			System.out.println((char)('a' + j) + " : " + abc[j]);

		}

		close();

	}

	public static String input() {

		return scanner.nextLine();

	}

	public static void close() {

		if (scanner != null) {

			scanner.close();

		}
	}
}