import java.util.Scanner;

public class Pr02LettersCombinations {

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

        char start = scanner.nextLine().charAt(0);
        char end = scanner.nextLine().charAt(0);
        char skip = scanner.nextLine().charAt(0);

        int combinationsCount = 0;

        for (char first = start; first <= end; first++) {
            if (first == skip) {
                continue;
            }
            for (char second = start; second <= end; second++) {
                if (second == skip) {
                    continue;
                }
                for (char third = start; third <= end; third++) {
                    if (third == skip) {
                        continue;
                    }
                    System.out.printf("%c%c%c ", first, second, third);
                    combinationsCount++;
                }
            }
        }

        System.out.println(combinationsCount);
    }
}