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: Bob started working on Mturk to get some money. Sentence2: He needed a good place to find helpful people and good HITs. Sentence3: Bob came across a forum called the MTG. Sentence4: He talked on this forum and was very happy to be involved. Sentence5: Bob eventually game a lead moderator of the MTG!

Ex Output:
Bob, Helpful people, Lead moderator

Ex Input:
Sentence1: Allie had rich parents. Sentence2: They decided to buy a plane. Sentence3: Allie was excited. Sentence4: Her parents got a deal. Sentence5: They used it right away.

Ex Output:
Parents, Allie

Ex Input:
Sentence1: Adam was deemed too old for St Jude. Sentence2: However, they decided to take him in anyway. Sentence3: The cancer had already spread all over his body. Sentence4: He received many treatments over the course of a year. Sentence5: He died for a staph infection obtained after surgery.

Ex Output:
Adam