#include <bits/stdc++.h>

using namespace std;

//typedef
//------------------------------------------
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;

//container util
//------------------------------------------
#define ALL(a)  (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define SZ(a) int((a).size())
#define EACH(i,c) for(typeof((c).begin()) i=(c).begin(); i!=(c).end(); ++i)
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())

//repetition
//------------------------------------------
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)  FOR(i,0,n)

//constant
//--------------------------------------------
const double EPS = 1e-10;
const double PI  = acos(-1.0);

int main(){
  cin.tie(0);
  ios_base::sync_with_stdio(false);

  string s = "pyon", num = string(10,'0');
  for(int i=0;i<10;++i){
	int mx = 0, mnum = 0;
	for(int j=0;j<10;++j){
	  num[i] = '0'+j;
	  cout << num << endl;
	  int x; string s;
	  cin >> x >> s;
	  if(mx < x) mx = x, mnum = j;
	  if(s == "unlocked") break;
	}
	if(mx == 10) break;
	num[i] = '0' + mnum;
  }
  
  return 0;
}