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;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string alphabet = "abcdefghijklmnopqrstuvwxyz";

            char[] alpahbetdef = alphabet.ToCharArray();

            //?????????????????°???????????????????????????
            List<int> resultcount = new List<int>();

            char[] inputstring = Console.ReadLine().ToCharArray();

            for (int i = 0; i < alphabet.Length; i++)
            {
                int count = 0;

                for(int j = 0; j < inputstring.Length; j++)
                {
                    //??§????????¨?°??????????????????????????????´?????????????????????
                    if(alphabet[i].ToString().ToUpperInvariant() == inputstring[j].ToString().ToUpperInvariant())
                    {
                        count += 1;
                    }
                }

                resultcount.Add(count);

            }


            //????????????

            for(int a = 0; a < alpahbetdef.Length; a++)
            {
                Console.WriteLine("{0} : {1}", alpahbetdef[a], resultcount[a]);
            }

        }
    
    }

}