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.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        String str = "";
        int[] cnt = new int[26];

        while(sc.hasNext()) {
            str = sc.nextLine();
            str = str.toLowerCase();
            char[] c = str.toCharArray();
            for(int i = 0; i < c.length; i++) {
                if('a' <= c[i] && c[i] <= 'z') {
                    cnt[c[i] - 'a']++;
                }
            }
        }
        for(int i = 0; i < 26; i++) {
            System.out.println(((char)(i + 'a')) + " : " + cnt[i]);
        }
    }
}