Letters Combinations

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        char x = scanner.nextLine().charAt(0),
                y = scanner.nextLine().charAt(0),
                z = scanner.nextLine().charAt(0);

        int counter = 0;

        for (int i = x; i <= y; i++) {
            for (int k = x; k <= y; k++) {
                for (int j = x; j <= y; j++) {
                    if (i != z && k != z && j != z) {
                        System.out.printf("%c%c%c ", i, k, j);
                        counter++;
                    }
                }
            }
        }

        System.out.println(counter);
    }
}