06. Triples of Latin Letters

import java.util.Scanner;

public class elevator {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = Integer.parseInt(scanner.nextLine());

        for (char letter1 = 'a' ; letter1 < 'a' + n ; letter1++) {
            for (char letter2 = 'a'; letter2 < 'a' + n; letter2++) {
                for (char letter3 = 'a'; letter3 < 'a' + n; letter3++) {
                    System.out.printf("%c%c%c%n",letter1, letter2,  letter3);
                }
            }
        }
    }
}