The two estates join at this point.
两块





接。
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But thinking of colors on the cube, you're naturally led to an interesting combinatorial question: Is there a way to color the cube so that the three neighbors of any given vertex will always represent red, green and blue.
但想到立方体上的颜色,你会自然地联想到一
有趣的组合问题:
否存在一种给立方体上色的方法,使得任何一
顶点的三

面总
代表红、绿、蓝三种颜色。