B. Given the following BNF grammar: -> d d | c c -> a | a -> b |b Use the top-down recursive descent method to implement a parser in python for the above BNF gram- mar. The input data file name is given from the command line. You may assume that there is a space character between two terminals (e.g. a a ad db ) in the data file. Submit your program elec- wing command on grail:

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