#include <bits/stdc++.h>
#define REP(i,n,N) for(int i=(n);i<(int) N;i++)
#define p(s) cout<<(s)<<endl
using namespace std;

int main(){
	string s;
	REP(i,0,1000){
		printf("%03d",i);
		cout<<endl;
		cin>>s;
		if(s=="unlocked") break;
	}
	return 0;
}