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

int main(){
	cin.tie(0),ios::sync_with_stdio(false);
	for(char i='0';i<='9';++i){
		for(char j='0';j<='9';++j){
			for(char k='0';k<='9';++k){
				cout<<i<<j<<k<<endl;
				string ans; cin>>ans;
				if(ans=="unlocked"s)return 0;
			}
		}
	}
}