def bubble_sort(array):
  for i in range(len(array)):
    for j in range(len(array) - 1):
      if array[j] > array[j + 1]:
        buffer = array[j]
        array[j] = array[j + 1]
        array[j + 1] = buffer
  return array

my_array = [5, 10, 1, 23, 11, 25, 19, -9]

print(bubble_sort(my_array))