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;
class Program
{
    static void Main(string[] args)
    {
        int[] alphabet = new int[26];
        string line = "";
        while ((line = Console.ReadLine()) != null)
        {
            char[] data = line.ToCharArray();
            for (int i = 0, count = data.Length; i < count; i++)
            {
                if (data[i] >= 'A' && data[i] <= 'Z')
                {
                    alphabet[data[i] - 'A']++;
                }
                else if (data[i] >= 'a' && data[i] <= 'z')
                {
                    alphabet[data[i] - 'a']++;
                }
            }
        }

        char chara = 'a';
        for (int i = 0; i < 26; i++)
        {
            Console.WriteLine("{0} : {1}", chara, alphabet[i]);
            chara++;
        }
    }
}