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: Wrong Answer)

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

public class Main {
	public static void main(String[] args) throws IOException{
		Character objChar1;

		char c;
		int cordchange=97;//??????????????????????????????????????????????????°???
		int total[]=new int[26] ;
		int i=0, num, sum;
		InputStreamReader isr = new InputStreamReader(System.in);
		
		BufferedReader br = new BufferedReader(isr);
		
		do {
			String str = br.readLine();
			if (str == null) {
		        continue;
		    }
		
		for (i = 0; i < str.length(); i++) {
				c = str.charAt(i);
				c=Character.toLowerCase(c);
				if(Character.isLetter(c))
					total[c-cordchange]++;
				
			}
		
		for(i=0;i<26;i++)
		{
			System.out.println((char)('a'+i)+" : "+total[i]);
		}
		
		}while (br.ready());
}
}