input: Write a python function to sort a list of strings alphabetically.
  assert sort_strings(['Python', 'Java', 'C++', 'C#']) == ['C#', 'C++', 'Java', 'Python']
  assert sort_strings(['banana', 'apple', 'cherry']) == ['apple', 'banana', 'cherry']
  assert sort_strings(['zebra', 'elephant', 'dog']) == ['dog', 'elephant', 'zebra']
output: def sort_strings(strings):
      return sorted(strings)