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.awt.*;
import java.awt.geom.*;
import java.io.*;

import java.util.*;
class Main {
	

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		HashMap<Character,Integer> map = new HashMap<Character,Integer>();
		char[] a = sc.nextLine().toCharArray();
		for(int i = 0; i < 26; i++) {
			map.put((char)('a'+i), 0);
		}
		for(int i = 0; i < a.length; i++) {
			if(map.containsKey(Character.toLowerCase(a[i]))) {
				map.put(Character.toLowerCase(a[i]), map.get(Character.toLowerCase(a[i]))+1);
			}
		}
		for(int i = 0; i < 26; i++) {
			System.out.println((char)('a'+i) + " : " + map.get((char)('a' + i)));
		}
	}
}