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.ArrayDeque;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String text = "";
        HashMap<Character, Integer> map = new HashMap<Character, Integer>();
        for (char i = 97; i < 123; i++) {
            map.put(i, 0);
        }
        while (scanner.hasNextLine()) {
            text += scanner.nextLine();
            break;
        }
        for (int i = 0; i < text.length(); i++) {
            map.put(text.charAt(i), map.getOrDefault(text.charAt(i), 0) + 1);
        }
        for (Character key : map.keySet()) {
            System.out.println(key + " : " + map.get(key));
        }
    }
}