Instructions: 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.
Input: Sentence1: Our city tows our street on the fourth Tuesday of the month. Sentence2: We sit outside to see the towing begin. Sentence3: One day a two truck started to tow a car. Sentence4: The owner came running out of the building. Sentence5: Luckily, all she got was a traffic ticket.
Output:
The owner, Our city