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

class Main {

	public static void main(String[] args) throws IOException {

		char[] line;
		char[] alphabets = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r',
				's', 't', 'u', 'v', 'w', 'x', 'y', 'z' };

		BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));

		String s = stdIn.readLine();
		StringBuilder sb = new StringBuilder();
//		while (s != null) {
			sb.append(s);
			s = stdIn.readLine();
//		}
		line = sb.toString().toCharArray();

		for (int i = 0; i < 26; i++) {
			int count = 0;

			for (char c : line) {
				if (c == alphabets[i]) {
					count++;
				}
			}
			System.out.println(alphabets[i] + " : " + count);
		}
		stdIn.close();
	}

}