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;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _1_8_c2
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] large = { "A","B","C","D","E","F","G",
                "H","I","J","K","L","M","N","O","P","Q","R",
                "S","T","U","V","W","X","Y","Z"};
            string[] small = { "a","b","c","d","e","f","g",
                "h","i","j","k","l","m","n","o","p","q",
                "r","s","t","u","v","w","x","y","z"};

            int[] count = new int[26];
            string Text = "";
            string Line;
            while ((Line = Console.ReadLine()) != null)
            {
                Text += Line;
            }
            for (int i = 0; i < Text.Length; i++)
            {
                string s = Text[i].ToString();
                for (int j = 0; j < 26; j++)
                {
                    if (s == large[j] || s == small[j])
                    {
                            count[j] += 1;
                    }
                }
            }
            for (int i = 0; i < 26; i++)
            {
                Console.WriteLine("{0} : {1}", small[i], count[i]);
            }
        }
    }
}