from itertools import chain
def combine_corresponding_inner_nested_lists(nested_list1, nested_list2):
return [x + y for x, y in zip(nested_list1, nested_list2)]
nested_list1 = [[1, 2], [3]]
nested_list2 = [[4], [5, 6]]
print(combine_corresponding_inner_nested_lists(nested_list1, nested_list2))
'''
run:
[[1, 2, 4], [3, 5, 6]]
'''