input: Write a python function to filter words from a list that have 7 or more characters.
  assert filter_list(['Apple', 'Banana', 'Cabbage', 'Cucumber']) == ['Cabbage', 'Cucumber']
  assert filter_list(['Strawberry', 'Grapes', 'Mango', 'Blueberry']) == ['Strawberry', 'Blueberry']
  assert filter_list(['Kiwi', 'Orange', 'Watermelon', 'Pineapple']) == ['Watermelon', 'Pineapple']
output: def filter_list(words):
      return [word for word in words if len(word) >= 7]