#include<bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(int i=(a);i<(b);i++)
int main(){
  cin.tie(0)->sync_with_stdio(0);
  cin.exceptions(cin.failbit);
  string ans="0000000000",res;
  rep(i,0,10){
    vector<int>A(10);
    rep(j,0,10){
      ans[i]='0'+j;
      cout<<ans<<endl;
      cin>>A[j]>>res;
      if(res=="unlocked")exit(0);
    }
    ans[i]=max_element(A.begin(),A.end())-A.begin()+'0';
  }
  assert(0);
  return 0;
}