#include <bits/stdc++.h>
using namespace std;
const int INF = 1 << 30;
const long long int MAX = 1e9 + 7;
void array_show(vector<long long int> &vec_s, int vec_n = -1,
                char middle = ' ') {
  if (vec_n == -1) vec_n = vec_s.size();
  printf("%d ", vec_n);
  for (int i = 0; i < vec_n; i++)
    printf("%lld%c", vec_s[i], (i != vec_n - 1 ? middle : '\n'));
  cout << flush;
}
const long long int range_max = 1e4;
void check(long long int pos, long long int n) {
  long long int m = min(pos, range_max);
  int i, j, k;
  long long int a, b, c;
  vector<long long int> vs;
  if (n <= m) {
    for (i = 0; i < n; i++) {
      vs.push_back(pos + i);
    }
    array_show(vs);
    return;
  }
  a = n / (m + 1) + 1;
  for (i = 0; i < m; i++) {
    b = pos + a * (i + 1) - 1;
    if (b >= pos + n) break;
    vs.push_back(b);
  }
  array_show(vs);
  cin >> b;
  if (b == -1) return;
  if (b == 0) {
    check(pos, a - 1);
    return;
  }
  if (b == vs.size()) {
    b = vs.back() + 1;
    check(b, pos + n - b);
    return;
  }
  check(vs[b - 1] + 1, a - 1);
}
int print_one(long long int a) {
  cout << 1 << " " << a << endl;
  cin >> a;
  return a;
}
int main() {
  int i, j, k;
  long long int a, b, c;
  const long long int n = 10004205361450474, n2 = 204761410474;
  vector<long long int> vs;
  a = print_one(n2);
  if (a == -1) return 0;
  if (a == 1) {
    check(n2 + 1, n - n2);
    return 0;
  }
  a = print_one(2046);
  if (a == -1) return 0;
  if (a == 1) {
    vector<long long int> vsa = {4094, 8190, 16382};
    for (i = 3; i < 2047; i++) {
      a = vsa.back() + range_max + 1;
      vsa.push_back(a);
    }
    vector<long long int> vsb = {vsa.back() + range_max + 1};
    b = (range_max + 1) * (range_max + 1);
    for (i = 1; i < 2047; i++) {
      a = vsb.back() + b;
      vsb.push_back(a);
    }
    array_show(vsb);
    cin >> a;
    if (a == -1) return 0;
    if (a > 0) {
      check(vsb[a - 1] + 1, vsb[a] - vsb[a - 1] - 1);
      return 0;
    }
    array_show(vsa);
    cin >> a;
    if (a == -1) return 0;
    if (a > 0)
      check(vsa[a - 1] + 1, vsa[a] - vsa[a - 1] - 1);
    else
      check(2047, 2047);
    return 0;
  }
  a = print_one(6);
  if (a == -1) return 0;
  if (a == 0) {
    a = print_one(2);
    if (a == -1) return 0;
    if (a == 0)
      print_one(1);
    else {
      cout << "3 3 4 5" << endl;
    }
    return 0;
  }
  vs = {14, 30, 62, 126, 254, 510, 1022};
  array_show(vs);
  cin >> a;
  if (a == -1) return 0;
  if (a == 0)
    check(7, 7);
  else {
    check(vs[a - 1] + 1, vs[a - 1] + 1);
  }
}
