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: Jena was cooking spaghetti for dinner. Sentence2: She went pick up the groceries from the store. Sentence3: The tomatoes appeared to be rotten. Sentence4: Jena picked up a jar of spaghetti sauce. Sentence5: She used pre made sauce instead of homemade.

Output: Jena

Input: Consider Input: Sentence1: Jake wanted to join little league. Sentence2: He had asthma and his parents were worried. Sentence3: He convinced them to let him. Sentence4: He had a lot of fun. Sentence5: His parents decided to trust him more.

Output: His parents, Jake

Input: Consider Input: Sentence1: Ben needed to lose weight. Sentence2: He bought a gym membership last week. Sentence3: When he went to the gym, he realized how weak he was. Sentence4: He could not even bench press eighty pounds. Sentence5: However, Ben seems willing to keep up with his workout schedule.
Output: Ben