#include<stdio.h>
int main(){
	double x,s,t=0,v=7.0,sum=0.0;
	scanf("%lf%lf",&s,&x);
	while(sum<s-x){
		sum+=v;
		v*=0.98;
		t++;
	}
	v=7.0;
	while(t--){
		sum+=v;
		v*=0.98;
	}
	if(sum>s+x)printf("n");
	else printf("y");
}