import java.time.*;
import java.util.*;
import java.util.stream.*;
public class AotApp {
    public static void main(String[] a) {
        long t0 = System.nanoTime();
        var m = IntStream.range(0, 2000).boxed().collect(Collectors.groupingBy(i -> i % 7, TreeMap::new, Collectors.summingInt(i -> i)));
        String s = String.format("%s %s %s", m, LocalDate.of(2026, 9, 21).getDayOfWeek(), Duration.ofSeconds(90));
        System.out.println(s.length() > 10 ? "ok" : "no");
    }
}