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;

public class Hello{
    
    
    
    static int [] ans=new int [100];
    
    
    public static void aiueo(string str)
    {
        for(int i=0;i<str.Length;i++)
        {
            if((int)str[i]<=90&&(int)str[i]>=65)ans[(int)str[i]-65]++;
            else if((int)str[i]>=97&&(int)str[i]<=122) ans[(int)str[i]-97]++;
        }
    }
    
    
    public static void Main(){
        
        
        
        string str=Console.ReadLine();
        
        for(;str!=null;){
            aiueo(str);
            str=Console.ReadLine();
        }
        
        for(int i=97;i<123;i++){
            Console.WriteLine("{0} : {1}",(char)i,ans[i-97]);
        }
        
        
        
    }
}