input: Write a python function to generate a list of odd numbers between x and y.
  assert odd_numbers(3, 10) == [3, 5, 7, 9]
  assert odd_numbers(1, 5) == [1, 3]
  assert odd_numbers(10, 15) == [11, 13]
output: def odd_numbers(x, y):
      return [num for num in range(x, y) if num % 2 != 0]