Today, in the game Ultimate Tic Tac Toe, we will play in such a world-famous game as tic-tac-toe. Now we will remind you the rules of this game. Before you will see the playing field divided into an equal number of squares. You will play crosses. Your task is to carefully examine the playing field and put a cross in one of their cells. Then your opponent will make a move and put a zero. Now it's your turn to make your move again. So you must build a line of three crosses. And while interfering with his opponent to do the same. The winner in the game is the one who is the first to form such a line.