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2. (10 p.) (a) Show that the following grammar is ambiguous: ::= ::=0123456789 (b) Find an unambiguous grammar for the same language as the grammar

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2. (10 p.) (a) Show that the following grammar is ambiguous: ~~::= ~~::=0123456789 (b) Find an unambiguous grammar for the same language as the grammar above. Make as few changes to the original grammar as possible~~~~

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