import java.util.Scanner;
 
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
 
        long l1 = scanner.nextLong();
        long r1 = scanner.nextLong();
        long l2 = scanner.nextLong();
        long r2 = scanner.nextLong();
        scanner.close();
 
        long left = Math.max(l1, l2);
        long right = Math.min(r1, r2);
 
        if (left <= right) {
            System.out.println(left + " " + right);
        } else {
            System.out.println(-1);
        }
    }
}
 

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