#include <bits/stdc++.h>
using namespace std;
template <class C>
void mini(C &a4, C b4) {
  a4 = min(a4, b4);
}
template <class C>
void maxi(C &a4, C b4) {
  a4 = max(a4, b4);
}
template <class TH>
void _dbg(const char *sdbg, TH h) {
  cerr << sdbg << '=' << h << endl;
}
template <class TH, class... TA>
void _dbg(const char *sdbg, TH h, TA... a) {
  while (*sdbg != ',') cerr << *sdbg++;
  cerr << '=' << h << ',';
  _dbg(sdbg + 1, a...);
}
template <class T>
ostream &operator<<(ostream &os, vector<T> V) {
  os << "[";
  for (auto vv : V) os << vv << ",";
  return os << "]";
}
template <class L, class R>
ostream &operator<<(ostream &os, pair<L, R> P) {
  return os << "(" << P.first << "," << P.second << ")";
}
const long long M = 10004205361450474ll;
const long long limk = 10000;
long long dp[limk + 1][6];
long long ile(long long k, long long zap) {
  if (k > limk) {
    k = limk;
  }
  if (zap == 1) {
    return k;
  }
  if (dp[k][zap] != 0) {
    return dp[k][zap];
  }
  long long &zysk = dp[k][zap];
  for (long long i = (0); i <= ((long long)(k)-1); i++) {
    zysk += ile(k + zysk, zap - 1);
    zysk++;
  }
  zysk += ile(k + zysk, zap - 1);
  return zysk;
}
long long pytaj(long long k, long long zap) {
  if (zap == 1) {
    cout << min(k, limk) << " ";
    for (long long i = (0); i <= ((long long)(min(k, limk)) - 1); i++) {
      cout << k + i << " ";
    }
    cout << endl;
    return 0;
  }
  cout << min(k, limk) << " ";
  long long zysk = 0;
  for (long long i = (0); i <= ((long long)(min(k, limk)) - 1); i++) {
    zysk += ile(k + zysk, zap - 1);
    cout << k + zysk << " ";
    zysk++;
  }
  cout << endl;
  long long odp;
  cin >> odp;
  if (odp < 0) {
    exit(0);
  }
  zysk = 0;
  for (long long i = (0); i <= ((long long)(odp)-1); i++) {
    zysk += ile(k + zysk, zap - 1);
    zysk++;
  }
  return k + zysk;
}
int32_t main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout << fixed << setprecision(11);
  if (0) cout << fixed << setprecision(6);
  for (long long i = (0); i <= ((long long)(6) - 1); i++)
    if (i) {
      (ile(1, i));
    }
  long long pocz = 1;
  for (long long i = (0); i <= ((long long)(5) - 1); i++) {
    pocz = pytaj(pocz, 5 - i);
  }
}
