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: Jrue dealt with leg injuries throughout his career. Sentence2: He was finally healthy entering last offseason. Sentence3: He did a lot of leg strengthening exercises. Sentence4: He had a minutes limitation at the start of this season. Sentence5: He now plays heavy minutes without any issues with his legs.

Ex Output:
Jrue

Ex Input:
Sentence1: Clayton was deathly afraid of house centipedes. Sentence2: One day he saw one scuttling around on his floor. Sentence3: Terrified, he called over his roommate to kill it for him. Sentence4: She walked in, unafraid, and swiftly smashed the bug with a book. Sentence5: Clayton was grateful and actually kind of impressed.

Ex Output:
Clayton, Roommate

Ex Input:
Sentence1: My sister and I went to bestbuy on black Friday Sentence2: We weren't sure what we wanted, just went for fun. Sentence3: Best buy had a xbox one available and decided to get one. Sentence4: We had to wait for almost an hour to get an xbox one. Sentence5: However, at the end it was worth it.

Ex Output:
I (myself), Sister