#include <bits/stdc++.h>
using namespace std;

void solve(){
  string T = "xxxxxxxxxx";
  int n;

  for (int i = 0; i < 10; ++i)
  {
    T[i] = '0'-1;
    for(;T[i]++;)
    {
      cout << T << endl;
      cin >> n; cin.ignore(10, '\n');
      if(n == i + 1) break;
    }
  }

}

signed main()
{
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout << fixed << setprecision(9);

  solve();

  return 0;
}