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.util.Scanner;

public class Main {
  public static void main(String[] args) {
	  Scanner sc = new Scanner(System.in);
	  while(sc.hasNext()) {
		  String str = sc.nextLine();
		  int alphabet[] = new int[26];
	  	for (char i : str.toCharArray()) {
	  		if (i >= 97 && i <= 122) {
				alphabet[i - 97]++;
			}
		}
	  	for (int i = 0; i < alphabet.length; i++) {
			char j = (char) (i + 97);
			System.out.println(j + " : " + alphabet[i]);
	  	}
	}
	  sc.close();
  }
}