#include<bits/stdc++.h>
using namespace std;
using Int = long long;
//INSERT ABOVE HERE
Int ask(string s){
  cout<<s<<endl;
  Int k;
  cin>>k>>s;
  if(k==10) exit(0);
  return k;
}
signed main(){
  const Int n=10;
  string s(n,'0');
  for(Int i=0;i<n;i++){
    Int k=-1,p=-1;
    for(Int j=0;j<10;j++){
      s[i]=char('0'+j);
      if(ask(s)>p) p=ask(s),k=j;
    }
    s[i]=char('0'+k);
  }
  return 0;
}