#include<bits/stdc++.h>
using namespace std;

main()
{
    int l1, r1, l2, r2;
    cin>>l1>>r1>>l2>>r2;

    if(l2 > r1)
    {
        cout<<"-1";
    }
    else if(l2 <= r1 && r2 <= r1)
    {
        cout<<l2<<" "<<r2;
    }
    else if(l2 == r1)
    {
        cout<<r1<<" "<<l2;
    }
    else if(l2 < r1 && r1 < r2)
    {
        cout<<l2<<" "<<r1;
    }

}