import java.util.Scanner;

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

        int K = Integer.parseInt(scanner.nextLine());
        int L = Integer.parseInt(scanner.nextLine());
        int M = Integer.parseInt(scanner.nextLine());
        int N = Integer.parseInt(scanner.nextLine());


        int countShift = 0;


        for (int k = K; k <= 8; k++) {
            if (k % 2 != 0) {
                continue;
            }
            for (int l = 9; l >= L; l--) {
                if (l % 2 == 0) {
                    continue;
                }
                for (int m = M; m <= 8; m++) {
                    if (m % 2 != 0) {
                        continue;
                    }
                    for (int n = 9; n >= N; n--) {

                        if (countShift == 6){
                            break;
                        }

                        if (n % 2 == 0) {
                            continue;
                        }

                        if (k == m && l == n) {
                            System.out.println("Cannot change the same player.");

                        }else {
                            countShift++;
                            System.out.printf("%d%d - %d%d%n", k, l, m, n);
                        }


                    }
                }
            }
        }
    }
}