import java.util.Collections;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.Set;
public class Main {
public static void main(String args[]) {
List list = Collections.EMPTY_LIST;
Set set = Collections.EMPTY_SET;
Map map = Collections.EMPTY_MAP;
List s = Collections.emptyList();
Set l = Collections.emptySet();
Map d = Collections.emptyMap();
}
}