#include<bits/stdc++.h>
using namespace std;
int main(){
    int s,k,n=0;
    double a=7.0;
    cin>>s>>k;
    int l1=s-k,l2=s+k;
    for(;;)
    {
        n+=a;
        if(n>=l1 && n<=l2)
        {
            if(n+a*0.98>l2)
            {
                cout<<"n";
                return 0;
            }
            else
            {
                cout<<"y";
                return 0;
            }
        }
        a*=0.98;
    }
    return 0;
}