def compare_phonebooks(expect: a1.PhoneBook, actual: a1.PhoneBook) -> bool:
exp_curr = expect.get_head()
act_curr = actual.get_head()
identical = True
while identical and exp_curr:
if act_curr and exp_curr.get_element() != act_curr.get_element():
identical = False
else:
exp_curr = exp_curr.get_next()
act_curr = act_curr.get_next()
if act_curr:
identical = False
return identical
