# slt

Brutal-force will exceed timeout.

## Solution1 Hash + Subsets

see [https://leetcode.com/problems/number-of-valid-words-for-each-puzzle/discuss/371864/Python-Find-all-Sub-Puzzles](https://leetcode.com/problems/number-of-valid-words-for-each-puzzle/discuss/371864/Python-Find-all-Sub-Puzzles)
