Given a list of strings return all possible combination of strings which would fit a 4x4 crossword puzzle.
Input List: [DUNK, FOLK, FILM, COOK, KITE, CARB, BITE, MOCK, TOOK]
Output List: One particular combination is [COOK, KITE, BITE, CARB]
C O O K

A I

R T

B I T E

Input : ATOM, ACID, PARK, LACK, MARK, DARK
Output :
A T O M

C A

I R

D A R K

Any suggestion/solutions?