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.

Input: Consider Input: Sentence1: Sam went on his weekly fishing trip with his dad. Sentence2: Usually Sam only catches small fish, but this time it was different. Sentence3: The fish almost pulled him off balance, but he caught it. Sentence4: The fish was longer than he was tall, and it was his biggest catch. Sentence5: Sam and his dad got a picture with the fish and cherished the memory.

Output: Dad, The fish, Sam

Input: Consider Input: Sentence1: Robert and his wife took a trip to Bermuda. Sentence2: They were at the beach one day when Robert was stung by a jellyfish. Sentence3: There wasn't anyone around to call for help. Sentence4: Robert remembered what he heard on the radio about jellyfish stings. Sentence5: He scraped the sting with a credit card to help stop the stinging.

Output: Anyone, Robert, Wife

Input: Consider Input: Sentence1: Derrick heard a window break outside his house. Sentence2: He ran out to see what it was and was horrified. Sentence3: His car was gone. Sentence4: He called the police in a panic. Sentence5: Then remembered he parked in the garage and his car was there.
Output: Derrick