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def upper(word: str) -> str:

"""

Will convert the entire string to uppercase letters

>>> upper("wow")

'WOW'

>>> upper("Hello")

'HELLO'

>>> upper("WHAT")

'WHAT'

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

'WH[]32'

"""

# Converting to ascii value int value and checking to see if char is a lower letter

# if it is a lowercase letter it is getting shift by 32 which makes it an uppercase

# 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()