You are given an m x n matrix board, representing the current state of a crossword puzzle. The crossword contains lowercase English letters (from solved words), ' ' to represent any empty cells, and '#' to represent any blocked cells.
A word can be placed horizontally (left to right or right to left) or vertically (top to bottom or bottom to top) in the board if:
'#'.' ' (empty) or match the letter already on the board.' ' or other lowercase letters directly left or right of the word if the word was placed horizontally.' ' or other lowercase letters directly above or below the word if the word was placed vertically.Given a string word, return true if word can be placed in board, or false otherwise.
m == board.lengthn == board[i].length1 <= m * n <= 2 * 10^5board[i][j] will be ' ', '#', or a lowercase English letter.1 <= word.length <= max(m, n)word will contain only lowercase English letters.board = [["#", " ", "#"], [" ", " ", "#"], ["#", "c", " "]], word = "abc"trueboard = [[" ", "#", "a"], [" ", "#", "c"], [" ", "#", "a"]], word = "ac"falseboard = [["#", " ", "#"], [" ", " ", "#"], ["#", " ", "c"]], word = "ca"true