Letters Combination

import java.util.Scanner;

public class p06_LettersCombination {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        char firstLetter = scanner.nextLine().charAt(0);
        char secondLetter = scanner.nextLine().charAt(0);
        char tirthLetter = scanner.nextLine().charAt(0);
        int count = 0;


        for (char i = firstLetter; i <= secondLetter; i++) {
            if (i == tirthLetter) {
                continue;
            }
            for (char j = firstLetter; j <= secondLetter; j++) {
                if (j == tirthLetter) {
                    continue;
                }
                for (char k = firstLetter; k <= secondLetter; k++) {
                    if (k == tirthLetter) {
                        continue;
                    }
                    count++;
                    System.out.print("" + i + j + k + " ");
                }
            }
        }
        System.out.print(count);
    }
}