#include <bits/stdc++.h>
using namespace std;
#define int long long
typedef pair<int,int> P;
int INF = 3e18+7;
int mod = 1e9+7;
int dx[] = {1, 0,-1, 0, 1, 1,-1,-1};
int dy[] = {0, 1, 0,-1, 1,-1, 1,-1};
signed main() {
    int N;
    cin >> N;
    if(N == 2) {
        cout << "INF" << endl;
    }
    else if(N <= 4) {
        cout << 6 << endl;
    }
    else if(N <= 6) {
        cout << 4 << endl;
    }
    else {
        cout << 2 << endl;
    }
}