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Exercises: Eliminate useless symbols from the grammar 1. P= {S-Aa, AbbCC, Cabb, E-C 2. P= {SaBa BC, AC | BCC, C+a, B-bcc, D-E, Ed) 3.

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Exercises: Eliminate useless symbols from the grammar 1. P= {S-Aa, AbbCC, Cabb, E-C 2. P= {SaBa BC, AC | BCC, C+a, B-bcc, D-E, Ed) 3. P= {S-Aa. ABB, Bab, CB 4. P= {S vaS | AB, A->A, BAA

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