input: Write a function to check if all strings in a list have the same length.
  assert check_strings_lengths(["apple", "mango", "peach"]) == True
  assert check_strings_lengths(["apple", "mango", "pear"]) == False
  assert check_strings_lengths(["a", "b", "c"]) == True
  assert check_strings_lengths(["apple"]) == True
output: def check_strings_lengths(lst):
      return all(len(s) == len(lst[0]) for s in lst)