#include <iostream>
using namespace std;
int main()
{
	int n;
	while (cin >> n)
	{
		int num = 0;
		while (n != 1)
		{
			if (n % 2 == 0)
			{
				n = n / 2;
			}
			else
			{
				n = (3 * n + 1) / 2;
			}
			num++;
		}
		printf("%d\n", num);
	}
	return 0;
}