Class TrieNode

python3/Tries/find_all_words_on_a_board.py:3–6

from typing import List

class TrieNode:
    def __init__(self):
        self.children = {}
        self.word = None

def find_all_words_on_a_board(board: List[List[str]], words: List[str]) -> List[str]:
    root = TrieNode()