#include<cstdio>
int main()
{
    int s,x,z=0;
    double sum=7;
    while(1)
    {
        z=z+sum;
        sum=sum*0.98;
        if(z>s-x)
        {
            if(z+sum>s+x)printf("n");
            else printf("y");
            break;
        }
    }
}