#include <bits/stdc++.h>
using namespace std;
const int N = 20;
int a[1 << N], n;
int main () {
	cin >> n;
	for (int i=0;i<(1<<n);i++) cin >> a[i];
	for (int x=0;x<(1<<n);x++) {
		for (int y=1;y<(1<<n);y<<=1) {
			for (int z=1;z<(1<<n);z<<=1) {
				int i = (x | y), j = (x | z);
				if (i == j) continue ;
				if (a[i] + a[j] < a[i ^ j] + a[i & j]) {
					cout << i << " " << j << endl;
					return 0;
				}
			}
		}
	}
	cout << -1 << endl;
	return 0;
}