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;


namespace aoj8c_b
{
    class Program
    {
        static void Main(string[] args)
        {
            string line;
            int[] counter = new int[26];

            while((line = Console.ReadLine()) != null)
            {
                char[] ch = line.ToCharArray();
                foreach (char x in ch)
                {
                    char y = '0';
                    if (char.IsUpper(x))
                    {
                        y = char.ToLower(x);
                    }

                    if (char.IsLower(y))
                    {
                        counter[y - 'a']++;
                    }
                }
                
            }
            for (int i = 0; i < 26; i++)
            {
                Console.WriteLine(Convert.ToChar(i + 'a') + " : " + counter[i]);
            }
        }
    }
}