#include <bits/stdc++.h>
#define IOS ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
using namespace std;

int Sequence(int n) {
    if (n == 1) return 1;
    if (n % 2 == 0)
        return 1 + Sequence(n / 2);
    return 1 + Sequence(3 * n + 1);
}

void solve() {
    cout << Sequence(9) << endl;

}

int main() {
    solve();
    return 0;
}