Python searching items in sulbist for a listA of items and returning index of not found items in listA

Question

listA = ['HM', 'GL', 'WD', 'HM', 'WD', 'HM', 'WD']

sublist = [['HM','GL'], ['GL'], ['WD','HM'], ['WD','GL'], ['WD'], ['HM','WD'], ['HM']]

Both list and sublist are of equal lengths, the output should be mismatching index, i.e. [3,5] index number of list are not found in corresponding sublist.

Answer 1

I think correct answer should be [3, 6]:

listA = ['HM', 'GL', 'WD', 'HM', 'WD', 'HM', 'WD']
sublist = [['HM','GL'], ['GL'], ['WD','HM'], ['WD','GL'], ['WD'], ['HM','WD'], ['HM']]

print([i for i, (a, b) in enumerate(zip(listA, sublist)) if not a in b])

Prints:

[3, 6]