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) {
        try(Scanner sc = new Scanner(System.in)){
            int counter[] = new int[128];
            while(sc.hasNext()) {
                String s = sc.nextLine().toLowerCase();
                for (int i = 0; i < s.length(); i++) {
                    int num = s.charAt(i);
                    counter[num]++;
                }
            }
            for(char i = 'a'; i <= 'z'; i++) {
                System.out.printf("%s : %d\n", i, counter[i]);
            }
        }
    }
}