import java.util.*;
public class Main {
	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		
		String ans = "";
		int count = 0;
		while(!ans.equals("unlocked")){
			System.out.println(String.format("%1$03d", count));
			count++;
			ans=sc.next();
		}
		
		
	}
}