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 AOJ
{
    class Program
    {
        static void Main(string[] args)
        {
            var char_count = new int[26];
           // while(false)
            {
                //??????????????????
                var read = Console.ReadLine();
                //var temp_string = read.Split(' ');

                if(read=="0")
                {
                   // break;
                }

                //???????????£????????????char?????????????§£
                var read_arry = read.ToCharArray();


                //char?????????1?????????????????????
                foreach(char c in read_arry)
                {
                    int UTF16_code=(int)char.ToLower(c);
                    if(UTF16_code>=97&&UTF16_code<=123)
                    {
                        char_count[UTF16_code - 97]++;
                    }

                }

                int roop_count=0;
                foreach(int temp in char_count)
                {
                    Console.WriteLine(Convert.ToChar(roop_count+97)+" : "+temp);
                    roop_count++;
                }
            }
            
        }
    }
}