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 Project
{
	class MainClass
	{
		public static void Main(string[] args)
		{
			string str = Console.ReadLine();
			string s = str.ToLower();
			char[] c = new[] { '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' };
			char[] cc = new char[s.Length];
			int[] a = new int[26];
			for (int i = 0; i < s.Length; i++)
			{
				cc[i] = s[i];
				switch (cc[i])
				{
					case 'a':
						a[0] += 1;
						break;
					case 'b':
						a[1] += 1;
						break;
					case 'c':
						a[2] += 1;
						break;
					case 'd':
						a[3] += 1;
						break;
					case 'e':
						a[4] += 1;
						break;
					case 'f':
						a[5] += 1;
						break;
					case 'g':
						a[6] += 1;
						break;
					case 'h':
						a[7] += 1;
						break;
					case 'i':
						a[8] += 1;
						break;
					case 'j':
						a[9] += 1;
						break;
					case 'k':
						a[10] += 1;
						break;
					case 'l':
						a[11] += 1;
						break;
					case 'm':
						a[12] += 1;
						break;
					case 'n':
						a[13] += 1;
						break;
					case 'o':
						a[14] += 1;
						break;
					case 'p':
						a[15] += 1;
						break;
					case 'q':
						a[16] += 1;
						break;
					case 'r':
						a[17] += 1;
						break;
					case 's':
						a[18] += 1;
						break;
					case 't':
						a[19] += 1;
						break;
					case 'u':
						a[20] += 1;
						break;
					case 'v':
						a[21] += 1;
						break;
					case 'w':
						a[22] += 1;
						break;
					case 'x':
						a[23] += 1;
						break;
					case 'y':
						a[24] += 1;
						break;
					case 'z':
						a[25] += 1;
						break;
					default:
						break;
				}
			}
			for (int i = 0; i < c.Length; i++)
			{
				Console.WriteLine("{0} : {1}",c[i],a[i]);
			}
		}
	}
}