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 JAVA (judge verdict: Accepted)

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static BufferedReader br;
	public static void main(String[] args)throws IOException{
		br = new BufferedReader(new InputStreamReader(System.in));
		int c[]=new int[26];
		String str;
		while((str = br.readLine())!=null){
			str = str.toLowerCase();
			for(int i=0;i<str.length();i++){
				char a='a';
				for(int j=0;j<26;j++){
					if(!Character.isLetter(str.charAt(i)))break;
					if(a==str.charAt(i)){
						c[j]++;
					}
					a++;
				}
			}
		}
		for(int i=0;i<26;i++){
			System.out.println((char)('a'+i)+" : "+c[i]);
		}
	}
}