#include "bits/stdc++.h"
#define MOD 1000000007
#define INF 11234567890
#define in std::cin
#define out std::cout
#define rep(i,N) for(LL i=0;i<N;++i)
typedef long long int LL;

int main()
{
	rep(num, 1000)
	{
		std::string input;
		out << std::setfill('0') << std::setw(3) << num << std::endl;
		in >> input;
		if (input == "unlocked") { break; }
	}
	return 0;
}