Question: A string x is a prefix of a string y if a string z exists where xz = y and that x is a proper

A string x is a prefix of a string y if a string z exists where xz = y and that x is a proper prefix of y if x!= y in addition. The NOPREFIX operation on a language L is defined as follows. NOPREFIX(L)={w in L | no proper prefix of w is a member of L}

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