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def reverse(array, i, j):

while i < j:

array[i], array[j] = array[j], array[i]

i += 1

j -= 1

def reverse_words(string):

arr = string.strip().split() # arr is list of words

n = len(arr)

reverse(arr, 0, n-1)

return " ".join(arr)

if __name__ == "__main__":

test = "I am keon kim and I like pizza"

print(test)

print(reverse_words(test))