#include <bits/stdc++.h>
using namespace std;
#define F first
#define S second
#define MP make_pair
#define PB push_back
#define all(x) begin(x), end(x)
using ll = long long;
using pi = pair<int, int>;
using pll = pair<ll, ll>;
using str = string;
template<typename T>
using vec = vector<T>;
template<typename T, size_t N>
using arr = array<T, N>;
const ll INF = 1e17;
const int MOD = 1e9 + 7;
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int N;
cin >> N;
for (int i = 1; i <= N; i++) {
int x, y;
cin >> x >> y;
}
cout << "-1\n";
}
