她发现组合很有趣。因为有三个，在任何时候，有两个姐妹牵着手会朝着相同的方向。一个人将面临不同的方式。无论您如何看待它，两个总是团结起来。一个是分开的。但是哪两个？哪一个？
(She found the combination intriguing. Because there were three, at all times two sisters holding hands would be facing the same direction. And one would be facing a different way. No matter how you looked at it, two would always be united. And one would be separate. But which two? And which one?)