#include <bits/stdc++.h>
using namespace std;
const int INF = 1e9;
const long long LINF = 1e18;
const double EPS = 1e-9;
long long gcd(long long a, long long b) { return b ? gcd(b, a % b) : a; }
long long lcm(long long a, long long b) { return a / gcd(a, b) * b; }
void yes() { cout << "Yes" << endl; }
void no() { cout << "No" << endl; }
int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout << -1 << endl;
  return 0;
}
