#include <bits/stdc++.h>
using namespace std;
long long int mpow(long long int base, long long int exp) {
  base %= 1000000007;
  long long int result = 1;
  while (exp > 0) {
    if (exp & 1) result = ((long long int)result * base) % 1000000007;
    base = ((long long int)base * base) % 1000000007;
    exp >>= 1;
  }
  return result;
}
const long long int INF = 1e8;
const double PI = 4 * atan(1);
char a[100][1000];
void solve() {}
int32_t main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  long long int i = 0, j = 0;
  int t;
  t = 1;
  while (t--) {
    solve();
  }
}
