让我们来玩五子棋。这个游戏的目标是在 9×9 的棋盘上连续得到 5 个（水平、垂直或对角线）。每次移动后打印棋盘（以 ABCDEFGHI/123456789 为轴）（用 x 和 o 表示移动，-表示空白）。你和我轮流下棋，也就是说，在我的每一步棋之后下你的棋。你不能将棋子放在其他棋子之上。在下棋前不要修改原棋盘。现在下第一步棋。
Let us play Gomoku. The goal of the game is to get five in a row (horizontally, vertically, or diagonally) on a 9×9 board. Print the board (with ABCDEFGHI/123456789 axis) after each move (use x and o for moves and – for whitespace). You and I take turns in moving, that is, make your move after my each move. You cannot place a move an top of other moves. Do not modify the original board before a move. Now make the first move.
