input: Write a function to sort odd numbers in descending order.
  assert odd_descending([14, 21, 8, 5, 46])==[21, 5]
  assert odd_descending([10, 9, 8, 7, 6, 5])==[9, 7, 5]
  assert odd_descending([1, 2, 3, 4, 5, 6, 7, 8, 9, 10])==[9, 7, 5, 3, 1]
output: def odd_descending(lst):
      return sorted([x for x in lst if x % 2 != 0], reverse=True)