#include<stdio.h>
#include<math.h>
int main(void)
{
    int i;
    double s,x;
    double swim,swim_next;
    scanf("%lf %lf",&s,&x);
    swim=7;
    for(i=1;swim<s+x;i++)
    {
        swim_next=(7*(1-pow(0.98,i+1)))/0.02;
        if(swim>s-x&&swim_next<s+x)
        {
            printf("y");
            exit(0);
        }
        swim=swim_next;
    }
    printf("n");
    return 0;
}