using System;
using System.Collections.Generic;

namespace Collatz{
	class Program{
		static int collatz(ulong value){
			bool print = false;
			if(value==704511)
				print = true;
			int i=0;
			for(i=0;value!=1;value = value%2==0 ? value/2 : value*3+1){
				i++;
				//if(print)
				//	Console.WriteLine(value);
			}
			return i;
		}
		static void Main(){
			String line;
			while((line= Console.ReadLine()) != null){
				ulong value = ulong.Parse(line);
				//collatz(value);
				Console.WriteLine(collatz(value));
			}
		}
	}
}