import java.util.Scanner;

public class Test3 {
    public static void main(String[] args) {
        Scanner console = new Scanner(System.in);

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

            int counter = 0;

            for (int i = K; i <= 8; i++){
                for (int j = 9; j >= L; j--){
                    for (int s = M; s <= 8; s++){
                        for (int b = 9; b >= N; b--){

                            if (i % 2 == 0 && j % 2 == 1 && s % 2== 0 && b % 2 == 1){

                                if (counter == 6){
                                    break;
                                }
                                if (i == s && j == b){
                                    System.out.println("Cannot change the same player.");
                                }else{
                                    counter++;
                                    System.out.printf("%s%s - %s%s%n",i,j,s,b);
                                }

                            }
                        }
                    }

                }
            }
    }
}