#include <stdio.h> #include <bits/stdc++.h> using namespace std; #define rep(i,n) for (int i = 0; i < (n); ++i) #define Inf 1000000000 int main(){ long long N; cin>>N; if(N==2){ cout<<"INF"<<endl; } else{ if(N==3)cout<<6<<endl; if(N==4)cout<<6<<endl; if(N==5)cout<<4<<endl; if(N==6)cout<<4<<endl; if(N>=7)cout<<2<<endl; } return 0; }