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;
class count{
    public static void Main(){
        String str = Console.ReadLine();
        str = str+"*";
        String bigs = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
        String smalls = "abcdefghijklmnopqrstuvwxyz";
        int[] count = new int[26];
        int o = 0;
        for(int i=0; i<26; i++){
            count[i] = 0;
        }
        while(!str.Equals("*")){
            foreach(char c in str){
                for(int i=0; i<26; i++){
                    if(c.Equals(bigs[i]) || c.Equals(smalls[i])){
                        count[i]++;
                    }
                }
            }
            str = Console.ReadLine();
            str = str+"*";
        }
        foreach(char c in smalls){
            Console.WriteLine("{0} : {1}",c,count[o]);
            o++;
        }
    }
}