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.*;
 
class Main{
    public static void main(String[] args){
		char a = 'a';
		int[] arr = new int[26];
		Scanner scan = new Scanner(System.in);
		String str = "";
		while(scan.hasNext()) {
            String buf = scan.nextLine();
            str += buf;
        }

		char[] ch = str.toLowerCase().toCharArray();
		for(char alf : ch){
			for(int i=0; i<26; i++){
				if(alf==(a+i)){
					arr[i] += 1;
				}
			}
		}
		for(int i=0; i<26; i++){
			System.out.println((char)(a + i) + " : " + arr[i]);
		}
    }
}