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.

Example Input: Sentence1: Jim wandered into someone else's room on the cruise ship. Sentence2: He saw a woman lying on the bed in lingerie. Sentence3: The woman beckoned him closer. Sentence4: Jim thought this couldn't be happening. Sentence5: He turned around and the woman's husband punched Jim.
Example Output: Woman, Jim, Woman's husband

Example Input: Sentence1: Martha is going camping. Sentence2: She has never been before. Sentence3: She is going with her husband. Sentence4: They get to the camp and set up the tent. Sentence5: Martha enjoys her time camping.
Example Output: Martha,s husband, Martha

Example Input: Sentence1: John was evicted from his apartment for excessive noise. Sentence2: A co-worker offered a couch to John while he looked for a new place. Sentence3: John was grateful. Sentence4: John slept on the co-worker's couch that night. Sentence5: John awoke to a note saying the coworker was being evicted!
Example Output:
John, Co-worker