#include <iostream>
using namespace std;

int main() {
    int x;

    while(cin>>x){
        int count = 0;

        while(x != 1){
            if(x % 2 == 0){
                x = x / 2;
                count = count + 1;
            }else{
                x = (3*x + 1) / 2;
                count = count + 1;
            }    
        }
        cout<<count<<endl;
    }
}
// 64 位输出请用 printf("%lld")