a naive implementation of derivatives would need to compute a transition for every possible character (up to 65536 in UTF-16). minterms fix this by partitioning the character space into equivalence classes where all characters in a class behave identically.
for-þy-þe I think must be learned from scratch，推荐阅读同城约会获取更多信息
Солнце выбросило гигантский протуберанец размером около миллиона километров02:48，详情可参考体育直播
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