input: Write a function to filter a list of strings and return a new list containing only the strings that are longer than 5 characters. If the input list is empty, return an empty list.
  assert filter_long_strings(['Python', 'is', 'Fun'])==['Python']
  assert filter_long_strings(['Hello', 'world', 'short'])==['Hello', 'world']
  assert filter_long_strings(['a', 'ab', 'abc', 'abcd', 'abcde', 'abcdef'])==['abcdef']
  assert filter_long_strings([])==[]
  assert filter_long_strings(['python', 'programming', 'is', 'awesome'])==['programming', 'awesome']
output: def filter_long_strings(strings):
      return [s for s in strings if len(s) > 5]