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.

Ex Input:
Sentence1: The county of Rochester needed a new park. Sentence2: The county council couldn't decide where to put it though! Sentence3: They couldn't afford the landscaping for one in the old empty lots. Sentence4: So they went to the city and asked for help. Sentence5: The city was glad to help, and soon Rochester had a new park.

Ex Output:
County council, City, County of rochester

Ex Input:
Sentence1: Ed's dream was to be a published author. Sentence2: He sent in many manuscripts to different publishers. Sentence3: Every time, his work was rejected. Sentence4: He decided to try one last time to get published. Sentence5: On his last try, the publisher finally accepted his work!

Ex Output:
Ed, Publisher

Ex Input:
Sentence1: Jonathan studies astrology at the local college. Sentence2: His current assignment has him look at star constellations. Sentence3: He managed to locate all but two of his star groupings for the task. Sentence4: Jonathan included in his report that he failed to find the last two. Sentence5: That night he went home to look at the stars for fun.

Ex Output:
Jonathan