input: Write a function to sort a list of strings alphabetically. The function should return the sorted list.
  assert alphabetical_sort(["Hello", "Yes", "No", "World"])==["Hello", "No", "World", "Yes"]
  assert alphabetical_sort(["apple", "banana", "cherry", "date", "fig"])==["apple", "banana", "cherry", "date", "fig"]
  assert alphabetical_sort(["zebra", "lion", "elephant", "tiger"])==["elephant", "lion", "tiger", "zebra"]
  assert alphabetical_sort([])==[]
  assert alphabetical_sort(["one", "two", "three", "four"])==["four", "one", "three", "two"]
output: def alphabetical_sort(strings):
      return sorted(strings)