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: Yesterday I was feeling rather lazy. Sentence2: It was the weekend and I decided to stay in. Sentence3: I crawled into bed and turned on Netflix. Sentence4: I decided to watch gossip girl. Sentence5: I watched for hours to occupy myself.

Ex Output:
I (myself)

Ex Input:
Sentence1: Sam wanted to learn how to read. Sentence2: He thought his friends would mock his illiteracy. Sentence3: But when they found out, they were all very kind. Sentence4: They even volunteered to teach him his letters. Sentence5: After months of studying, Sam became a great reader!

Ex Output:
His friends, Sam

Ex Input:
Sentence1: I smoked for about ten years, and I was happy with it. Sentence2: There was no need to quit, I'm already old. Sentence3: Other people mistakenly thought that they could help me quit. Sentence4: These folks believed they were helping me. Sentence5: I still smoke, and many people are sad, but maybe I'll quite someday.

Ex Output:
I (myself), Folks, People