#include <bits/stdc++.h>

#define pp pop_back
#define pb push_back
#ifdef KTL
  #define fname ""
#else
  #define fname "travel."
#endif
#define forn(i, x, n) for (int i = int(x); i <= int(n); ++i)
#define for1(i, n, x) for (int i = int(n); i >= int(x); --i)
#define mp make_pair
#define s second
#define f first
#define sz(a) (int)((a).size())

using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair < int, int > pi;

const int N = 1e6;
const int mod = 1e9 + 7;

int n;

int main() {
  #ifdef wws
    freopen("in", "r", stdin);
  #endif
  ios_base :: sync_with_stdio(NULL), cin.tie(NULL), cout.tie(NULL);
  cout << -1 << endl;
  return 0;
}