input: Write a function to take a list of strings and sort them alphabetically in ascending order. The function should return the sorted list.
  assert sort_strings(["Hello", "Yes", "No", "World"])==["Hello", "No", "World", "Yes"]
  assert sort_strings(["Apple", "Banana", "Orange"])==["Apple", "Banana", "Orange"]
  assert sort_strings(["Zebra", "Ant", "Lion"])==["Ant", "Lion", "Zebra"]
  assert sort_strings([])==[]
  assert sort_strings(["a", "A", "b", "B"])==["A", "B", "a", "b"]
output: def sort_strings(lst):
      return sorted(lst)