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: Wrong Answer)

using System;
using System.Collections.Generic;

class Prgram
{
    static void Main()
    {
        string str = Console.ReadLine();
        char[] chaan = new char[str.Length];
        chaan = str.ToCharArray();

        for(int i=0;i < chaan.GetLength(0);i++)
        {
            chaan[i] = char.ToLower(chaan[i]);
        }

        int[] alp = new int[26];
        
        for(int i=0;i<chaan.GetLength(0);i++)
        {
            if ( ('a' <= chaan[i]) && ('z' >= chaan[i]))
            {
                alp[chaan[i]-'a']++;
            }
        } 


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

    }

   

 
    
}