How to search and count the common values between a simple list and a two dimensional list?

Question

A = [2,7,85,4]
B = [[1,33,6],[3,5,7,6],[1,85,77]]
The idea is to see which numbers are common in those two lists and how many.
Flattening is not an option, each sublist in B should have a separate result when u run the code.

Answer 1

Show your code

Answer 2

https://code.sololearn.com/c1WtnT3bxC5i/?ref=app

Answer 3

Slick nice, but i wanted to print how MANY common values each sublist has in common. Something like:
L2[0]= 0
L2[1]=2
L2[2]=1