Q: In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.
Sentence1: Sue got in her car and frowned at how filthy the window was. Sentence2: Her dog's nose had made quite a mess of the glass. Sentence3: She wondered if he had worked hard to create that window art for her. Sentence4: Sue sort of felt bad as she cleaned it away. Sentence5: The next day, her dog created a new masterpiece on the window.
A:
Sue, Dog