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: Sara and Joseph were planning their wedding. Sentence2: They were on a tight budget. Sentence3: They couldn't afford a three tiered cake. Sentence4: Sara ordered a one tier cake and baked matching cupcakes. Sentence5: The cupcakes were a big hit amongst the guest.

Output: Joseph, Sara, Guest

Input: Consider 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.

Output: Martha,s husband, Martha

Input: Consider Input: Sentence1: Simon invited his friend Joey over for a play-date. Sentence2: He was looking forward to playing Minecraft with his friend. Sentence3: Right before Joey arrived, the internet went out. Sentence4: Simon tried resetting the router, but it didn't help. Sentence5: Simon and Joey played outside until the router was back online.
Output: Simon, Joey