#include <iostream>
#include <cmath>
using namespace std ;

int main() {

    long long l1 , r1 , l2 , r2 ;
    cin >> l1 >> r1 >> l2 >> r2 ;
    if (r1 >= l2 && r2 >= l1) {
        cout << max(l1,l2) << " " << min(r1,r2) ;
    } else {
        cout << "-1" ;
    }




    return 0;
}