Implement `check(board)` for a 9-cell board (list of strings, "" for empty). Run it on these boards and print the result for each: ["X","X","X","","O","","O","",""] # X wins top row ["X","O","X","O","X","O","O","X","O"] # draw, no winner ["X","O","","X","O","","X","",""] # X wins left column Expected: X draw X