import javax.swing.plaf.IconUIResource;
import java.util.Scanner;

public class Substitude {

    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 count = 0;
        boolean finish = false;

        for (int i = K; i <= 8; i++) {
            for (int j = 9; j >= L; j--) {
                for (int k = M; k <= 8; k++) {
                    for (int l = 9; l >= N; l--) {
                        if ((((i % 2 == 0 && k % 2 == 0)) && ((j % 2 == 1 && l % 2 == 1)))) {
                        String num1 = "" + i + j;
                        String num2 = "" + k + l;
                            if (num1.equals(num2)) {
                                System.out.println("Cannot change the same player.");
                            } else {
                                System.out.println(num1 + " " + "-" + " " + num2);
                                count++;
                            }
                        }
                        if (count == 6) {
                            finish = true;
                            break;
                        }
                    }
                    if(finish){
                        break;
                    }
                    }
                if(finish){
                    break;
            }

            }
            if(finish){
                break;
        }
    }
    }}