What's wrong with below code, why all the test cases are not passing.

from collections import defaultdict

d=defaultdict(list)

A = ['a','b','a','b']

B= ['c']

for i in B:

if i in A:

    for index,j in enumerate(A):

        if i==j:

            d[i].append(index+1)

else:

    d[i].append(int(-1))

for values in d.values():

print(*values)