Security Code Coach

Question

Im currently working on the Security Code Coach challenge…
But I only manage to pass cases 1, 2 and 4

Heres my code:
https://code.sololearn.com/cJB5QwxUVDwZ/?ref=app
(Please dont just post the solution)

Answer 1

One situation:
When $ is first position, it fails because nearestLower is undefined..

Answer 2

Jayakrishna🇮🇳 Oh I overlooked that… Thanks! 😀

Answer 3

code = input()
strip_x = [letter for letter in code if letter != "x"]
code_dict = {}

for lt in strip_x:
code_dict[lt] = strip_x.index(lt)

if code_dict['T'] == code_dict['#x27;] + 1 or code_dict['T'] == code_dict['#x27;] - 1:
print("ALARM")
else:
print("quiet")