Matrix

import java.util.Scanner;

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

        int a = Integer.parseInt(scanner.nextLine());
        int b = Integer.parseInt(scanner.nextLine());
        int c = Integer.parseInt(scanner.nextLine());
        int d = Integer.parseInt(scanner.nextLine());


        for (int i = a; i < b; i++) {
            for (int j = a +1; j <= b; j++) {
                if(i == j){continue;}
                for (int k = c; k < d; k++) {
                    for (int f = c+1; f <= d; f++) {
                        if(k == f){continue;}
                            if (i + f == j + k) {
                                System.out.printf("%d%d%n", i, j);
                                System.out.printf("%d%d%n", k, f);
                                System.out.println();
                                System.out.printf("%d%d%n", j, i);
                                System.out.printf("%d%d%n", f, k);
                                System.out.println();
                        }
                    }
                }

            }
        }
    }
}