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.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int chcnt[] = new int[26];
        String str = "";
        while(sc.hasNext()){
            str = sc.nextLine();
            str = str.toLowerCase();
            for(int i = 0; i < str.length(); i++ ){
                char ch = str.charAt(i);
                if(ch <= 'z' && ch >= 'a') chcnt[ch - 'a']++;
            }
        }
        for(int i = 0; i < chcnt.length; i++){
            System.out.println((char)('a' + i) + " : " + chcnt[i]);
        }
    }
}