CombinationOfLetters

import java.util.Scanner;

public class Else {
    public static void main(String[] args) {
        Scanner console = new Scanner(System.in);
        char a = console.next().charAt(0);
        char b = console.next().charAt(0);
        char c = console.next().charAt(0);
        int count = 1;

        for (char k = a; k <= b; k++) {
            for (char i = a; i <= b; i++) {
                for (char j = a; j <= b; j++) {
                    if ((k == c) && (i == c) && (j == c)) {
                        break;
                    } else {
                        System.out.printf("%s%s%s ", k, i, j);
                        count+=1;
                    }
                }
            }
        }
    }
}