Instructions: 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: 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