import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        double s = sc.nextDouble(), x = sc.nextDouble();
        double sum = 7.0;
        double m = 0.0; // 当前位置
        while (true) {
            m += sum;
            if (m >= (s - x)) {
                sum = sum * 0.98;
                m += sum;
                if (m > (int)(s + x)) {
                    System.out.println("n");
                    break;
                } else {
                    System.out.println("y");
                    break;
                }
            }
            sum = sum * 0.98;
        }
    }
}