input: Write a function to sort a list of strings alphabetically. The function should return the sorted list. If the input list is empty, the function should return the empty list.
  assert alphabetical_sort(["Hello", "Yes", "No", "World"])==["Hello", "No", "World", "Yes"]
  assert alphabetical_sort(["Banana", "Apple", "Orange"])==["Apple", "Banana", "Orange"]
  assert alphabetical_sort(["Zebra", "Ant", "Cat"])==["Ant", "Cat", "Zebra"]
  assert alphabetical_sort([])==[]
output: def alphabetical_sort(lst):
      return sorted(lst)