Frustrated with Assignment. S.O.S! HELP!

[perfringo]

So the "verify" function is suppose to verify and "pass" or "fail" any given string list in the format of '####-####-####', based on four rules.

So the function should return 'pass' or 'fail' for give string, not the compliance to specific rule?

>>> def verify(string):  
...     digits = ''.join(char for char in string if char.isdigit())  
...     first_rule = digits[0] == '4' 
...     second_rule = int(digits[3]) - int(digits[4]) == 1 
...     third_rule = sum(int(num) for num in digits) % 4 == 0 
...     fourth_rule = int(digits[:2]) +  int(digits[6:8]) == 100 
...     if all([first_rule, second_rule, third_rule, fourth_rule]): 
...         return 'pass' 
...     else: 
...         return 'fail' 
...                                                                                       
>>> verify('4094-3460-2754')                                                              
'pass'
>>> verify('4084-3460-2754')                                                              
'fail'