input: Write a python function to sort a list of items in ascending order.
  assert sort_items(['Banana', 'Apple', 'Cherry', 'Avocado']) == ['Apple', 'Avocado', 'Banana', 'Cherry']
  assert sort_items(['dog', 'cat', 'elephant', 'bee']) == ['bee', 'cat', 'dog', 'elephant']
  assert sort_items(['zebra', 'monkey', 'aardvark', 'lion']) == ['aardvark', 'lion', 'monkey', 'zebra']
output: def sort_items(items):
      return sorted(items)