ttt

def main():
    board = Board()
    with Terminal() as ui:
        keys = ui.gen_key_events()
        while True:
            ui.render(board.view())
            if board.ended():
                break
            for k in keys:
                if k == '^D':
                    return
                try:               move = int(k)
                except ValueError: continue
                board = board.move(move)
                ui.render(board.view())
                break
            if board.ended():
                break
            board = ai(board, 'o')
        next(keys)