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

typedef long long ll;

int main ()
{
    //freopen("in.txt","r",stdin);
    //freopen("out.txt","w",stdout);
    std::ios::sync_with_stdio(false);
    cin.tie(NULL);
    int a;
    for(int i=0;i<4;i++){
        cin>>a;
    }
    cout<<-1<<endl;
    return 0;
}