#include <iostream>
#include <string>

using namespace std;

int main()
{
	while(1)
	{
		int n,count = 0;
		cin >> n;
		if(cin.eof())
		{
			break;
		}
		while(n != 1)
		{
			if(n % 2)
			{
				n *= 3;
				n++;
				count++;
				continue;
			}
			n /= 2;
			count++;
		}
		cout << count << endl;
	}
	return 0;
}