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: Bob bought a bag of potato chips from the store. Sentence2: It was a huge bag meant for a family. Sentence3: But Bob ripped open the bag and dove in. Sentence4: He didn't live that far from the store. Sentence5: Even still, he was finished by time he got home!

Output: Bob, The store

Input: Consider Input: Sentence1: Ken is a DJ for a club. Sentence2: Last night he had a really annoying patron. Sentence3: They kept asking for different songs. Sentence4: Ken kept having to turn him down. Sentence5: Eventually he just ignored him completely.

Output: Ken, Annoying patron

Input: Consider Input: Sentence1: Brad found a gold ring on the ground. Sentence2: He took it to a pawn shop. Sentence3: He was so eager to get money for it! Sentence4: But the shop owner frowned and said the ring wasn't real gold. Sentence5: Brad was so disappointed!
Output: Shop owner, Brad