#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;
}