题目内容
在形式语言中，若文法G的产生式集P为：
(1)Z→Bc(2)Z→Zc(3)B→Ab(4)B→Bb(5)A→Aa(6)A→a
则文法G是(27)文法，识别G的自动机为(28)。对于G来说，(29)为文法G可接受的字符串，(30)为文法G不可接受的字符串。
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