input: Write a python function to count even and odd numbers in a list.
  assert count_odd_even([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]) == [5, 5]
  assert count_odd_even([10, 20, 45, 67, 84, 93]) == [3, 3]
  assert count_odd_even([5, 7, 9, 8, 6, 4, 3]) == [3, 4]
output: def count_odd_even(numbers):
      odd_count = sum(1 for num in numbers if num % 2 != 0)
      even_count = len(numbers) - odd_count
      return [odd_count, even_count]