#include<iostream>
using namespace std;

int main(void)
{
	int n;
	while(cin >> n)
	{
		int res = 0;
		while(n != 1)
		{
			res++;
			if(n % 2 == 0) n /= 2;
			else n = (3 * n + 1) / 2;
		}
		cout << res << endl;
	}
	
	
	
	return 0;
}