#include <bits/stdc++.h>
using namespace std;
int main(){
    int s,x;
    cin>>s>>x;
    double m=7;
    cin>>s>>x;
    while(m<=x){
        m=m+m*0.98;
    }
    if(s+x>m+m*0.98)cout<<"y"<<endl;
    else cout<<"n"<<endl;
    return 0;
}

#1,#2,#5WA