import java.io.*;
import java.util.*;
import java.math.*;

class Main {
	
	public static void out (Object o) {
		System.out.println(o);
	}
	
	public static void main (String[] args) throws IOException {
		BufferedReader br = 
			new BufferedReader(new InputStreamReader(System.in));
		
		for (int i = 0; i < 1000; i++) {
			String s = i + "";
			while (s.length() < 3) s = "0" + s;
			out(s);
			String t;
			while ((t = br.readLine()) == null) {}
			if (t.equals("locked")) break;
		}
	}
}