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: Barry took a science class. Sentence2: He didn't expect an essay. Sentence3: He took a test with one. Sentence4: He did his very best. Sentence5: Barry didn't do so well.

Ex Output:
Barry, Science class

Ex Input:
Sentence1: Billy needed to make some money. Sentence2: He decided on Friday night he would work from home. Sentence3: Turning his computer on he realized there was a lot of work up! Sentence4: It didn't take him long to get into the swing of things. Sentence5: Before he knew it, he was working his butt off and making money.

Ex Output:
Billy

Ex Input:
Sentence1: I don't know how to stop wasting time. Sentence2: Everyday I try to write down what I want to accomplish. Sentence3: Then, I always get side tracked. Sentence4: Next thing you know it is almost time to go to bed. Sentence5: I then realize I didn't accomplish anything.

Ex Output:
I (myself)