Technically, a gap is a maximal sequence of contiguous Spaces.

从技术上讲，间隙是最大的连续空格序列。

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For the purposes of this problem, a word is defined to be a maximal sequence of upper - and lower-case letters.

对于这个问题的目的，一个字被定义为一个大写和小写字母最大序列。

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MaxBy - "Returns the maximal element of the given sequence, based on the given projection."

MaxBy——根据给定的投影返回给定的序列的最大元素。

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