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def exchange_sort(numbers: list[int]) -> list[int]:

"""

Uses exchange sort to sort a list of numbers.

Source: https://en.wikipedia.org/wiki/Sorting_algorithm#Exchange_sort

>>> exchange_sort([5, 4, 3, 2, 1])

[1, 2, 3, 4, 5]

>>> exchange_sort([-1, -2, -3])

[-3, -2, -1]

>>> exchange_sort([1, 2, 3, 4, 5])

[1, 2, 3, 4, 5]

>>> exchange_sort([0, 10, -2, 5, 3])

[-2, 0, 3, 5, 10]

>>> exchange_sort([])

[]

"""

numbers_length = len(numbers)

for i in range(numbers_length):

for j in range(i + 1, numbers_length):

if numbers[j] < numbers[i]:

numbers[i], numbers[j] = numbers[j], numbers[i]

return numbers

if __name__ == "__main__":

user_input = input("Enter numbers separated by a comma:\n").strip()

unsorted = [int(item) for item in user_input.split(",")]

print(exchange_sort(unsorted))