input: Write a function to print the elements of a list in original and sorted (descending) order.
  assert custom_print([10, 2, 5, 1, 20])==([10, 2, 5, 1, 20],[20, 10, 5, 2, 1])
  assert custom_print([3, 1, 2])==([3, 1, 2], [3, 2, 1])
  assert custom_print([4, 4, 4])==([4, 4, 4], [4, 4, 4])
output: def custom_print(lst):
      original_list = lst[:]
      sorted_list = sorted(lst, reverse=True)
      return original_list, sorted_list