#include<bits/stdc++.h> using namespace std; int main(){ int n,a=0,b=0; char k; cin>>n; for(int i=1;i<=n;i++){ cin>>k; if('A'<=k&&k<='E') a++; else b++; } if(a>b) cout<<"xf"<<endl; else if(a==b) cout<<"same"<<endl; else cout<<"xy"<<endl; return 0; }