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: Memory Limit Exceeded)

import java.util.Scanner;
import java.io.*;
public class Main{
	public static void main(String [] args){
		BufferedReader r = new BufferedReader(new InputStreamReader(System.in),1200);
		String work = "";
		try{
			while((work += r.readLine()) != null){
				
			}
		}catch(Exception e){
			System.out.println(e);
		}
		work = work.toLowerCase();
		int code;
		int count[] = new int[26];
		for(int i = 0; i < work.length(); i++){
			code = ((int)work.charAt(i)) - 97;
			if(!(0 <= code && code <= 25)){
				continue;
			}
			count[code]++;
		}
		for(int i = 0; i < count.length; i++){
			
			System.out.printf("%c : %d\n",i+97,count[i]);
		}
	}
}