# -*- coding: utf-8 -*-

N=int(input())


ans=1
while 1:
    ans+=1
    if N==1: 
        break
    else:
        if ans>=50:
            ans="No"
            print(ans)
            exit()

    ans+=1
    if N%2==0:
        N//=2
    else:
        N=N*3+1

print(ans)