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Language/Type: Python set collections streams

Write a function named word_count that accepts a file name as a parameter and opens that file and that returns a count of the number of unique words in the file. Do not worry about capitalization and punctuation for example, "Hello" and "hello" and "hello!!" are different words for this problem. Use a set as auxiliary storage.

Function: Write a Python function as described, not a complete program.

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