#include <iostream>
using namespace std;

int main() {
    int a;
    while (cin >> a) { // 注意 while 处理多个 case
        int count =0;
        while (a!=1){
            if (a%2==0){
                a=a/2;
                count++;
            }else if(a%2 != 0){
                a= (a*3+1)/2;
                count++;
            }
        }
        cout<<count<<endl;
    }
}
// 64 位输出请用 printf("%lld")