//problem no 3 space x,blue origin
#include<stdio.h>
int main()
{
 int t1,e1,t2,e2;
 double per_hour1,per_hour2;
 scanf("%d %d %d %d",&t1,&e1,&t2,&e2);
 per_hour1=e1/t1;
 per_hour2=e2/t2;
 if(per_hour1<per_hour2)printf("Space X\n");
 else printf("Blue Origin\n");


}