HackerRank-Solutions/Implementation/Brute Force/Pangrams/Solution.java

//     Author: Rodney Shaghoulian
//     Github: github.com/RodneyShag
// HackerRank: hackerrank.com/RodneyShag

import java.util.Scanner;
import java.util.HashSet;

public class Solution {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String str = scan.nextLine().toLowerCase();
        scan.close();
        
        HashSet<Character> set = new HashSet<>();
        for (int i = 0; i < str.length(); i++) {
            char ch = str.charAt(i);
            if (Character.isLetter(ch)) {
                set.add(ch);
            }
        }

        System.out.println(set.size() == 26 ? "pangram" : "not pangram");
    }
}