Question: I need to Build a program called countVowels.py that has a function that takes in a string then prints the number of unique vowels in

I need to Build a program called countVowels.py that has a function that takes in a string then prints the number of unique vowels in the string (regardless of it being upper or lower case). For example: The argument "swEet" should print 1 The argument "AaaaeeE" should print 2

sys.argv must be used and no input() can be used

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