import sys
sys.setrecursionlimit(5*10**5)
input = sys.stdin.readline
sys.set_int_max_str_digits(0)
from collections import defaultdict, deque, Counter
from heapq import heappop, heappush
from bisect import bisect_left, bisect_right
from math import gcd, lcm, factorial, perm, comb
from itertools import product, permutations
#重複あり：list(product(list('123'),repeat = 2)),重複なし：list(permutations(list('123')))
MOD = 998244353

n = int(input())

if n<0:
    print('No')
    exit()

def cal(n, cnt):
    if cnt > 49:
        return print('No')
    
    if n==1:
        return print(cnt+1)
    else:
        cnt+=1
    
    if n%2==0:
        return cal(n//2,cnt+1)
    else:
        return cal(3*n+1,cnt+1)

cal(n,1)