input: Write a function to sort a list of strings alphabetically in ascending order. If the list is empty, return it as is.
  assert sort_strings(["Hello", "Yes", "No", "World"])==['Hello', 'No', 'World', 'Yes']
  assert sort_strings(["apple", "banana", "cherry"])==['apple', 'banana', 'cherry']
  assert sort_strings(["zebra", "ant"])==['ant', 'zebra']
  assert sort_strings([])==[]
  assert sort_strings(["cat", "dog", "bat"])==['bat', 'cat', 'dog']
output: def sort_strings(lst):
      return sorted(lst)