Class TrieNode

kotlin/Tries/FindAllWordsOnABoard.kt:1–4

data class TrieNode(
    var word: String? = null,
    val children: HashMap<Char, TrieNode> = hashMapOf()
)

fun findAllWordsOnABoard(board: Array<CharArray>, words: List<String>): List<String> {
    val root = TrieNode()