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def lower(word: str) -> str:

"""

Will convert the entire string to lowercase letters

>>> lower("wow")

'wow'

>>> lower("HellZo")

'hellzo'

>>> lower("WHAT")

'what'

>>> lower("wh[]32")

'wh[]32'

>>> lower("whAT")

'what'

"""

# converting to ascii value int value and checking to see if char is a capital

# letter if it is a capital letter it is getting shift by 32 which makes it a lower

# case letter

return "".join(chr(ord(char) + 32) if "A" <= char <= "Z" else char for char in word)

if __name__ == "__main__":

from doctest import testmod

testmod()