Coding in Python, need help!! Thanks in advance!

Write the function countWords(document), where document is the name of a txt file that contains multiple strings. This function returns (not prints) a dictionary whose keys are included words (in lowercase), and values their word counts. You can assume the string doesnt have any contraction words such as cant, dont, isnt, etc. The starter code already contains the code to read the txt file, just make sure the file is in the same directory as your .py file.

Hint: Remove punctuation and numbers before counting the words,