#include
using namespace std ;
#include
/* run this program using the console pauser or add your own getch, system(“pause”) or input loop */
int main() {
int n,v1,v2;
cin>>n;
cin>>v1;
cin>>v2;
int timeinelevator,timebystairs;
timeinelevator=n/v1;
timeinstairs=(n*sqrt(2))/v2;
if (timeinelevator>timeinstairs)
cout<<“stairs”;
else
cout<<“elevator”;
return 0;
}