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 C# (judge verdict: Accepted)

using System;
using System.Collections.Generic;


class A
{
	public static void Main ()
	{

		int[] output = new int[26];


		while (true) {
			string s = Console.ReadLine ();

			if (s == null|| s.Length == 0)
				break;
			string s2 = s.ToUpper ();


			for (int i=0; i	<s2.Length; i++) {
				if (s2 [i] >= 'A' && s2 [i] <= 'Z') {
					output [(int)s2 [i] - 'A']++;
				}
			}

		}

		for (int i =0; i<output.Length; i++) {
			Console.WriteLine ("{0} : {1}", Convert.ToChar (i + 'a'), output [i]);
		}
	}
}