def sort(arr):
    count = len(arr) - 1
    for i in range(count):
        for j in range(count-i):
            if arr[j] < arr[j+1]:
                arr[j], arr[j+1] = arr[j+1], arr[j]
    return arr

l = [5, 2, 7, 8, 6, 1, 4, 9, 10, 1, 2, 3, 4]
print(sort(l))

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