提取列表中的子列表的索引

Given list_a and list_b. I want to run list_b through a function that gives all possible sublist of list_b (this part of the code works). I then want to take every sublist of list_b, and see if that sublist is also a sublist of list_a. If it is I should get a list of all the indexes, or splices where that sublist appears in list_a. Given list_a and list_b. I want to run list_b t