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