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: Darrel was sleeping peacefully. Sentence2: He had worked for 12 hours and was exhausted! Sentence3: He felt something wet and sticky on his face. Sentence4: His dog had missed him while he was at work. Sentence5: The dog wouldn't stop giving him kisses!
Example Output: Darrel, Dog

Example Input: Sentence1: For mother's day Jane cooked her mother's favorite meal. Sentence2: It is Italian spaghetti with garlic bread. Sentence3: She spent several hours cooking it. Sentence4: Her mom eat it. Sentence5: She loved it.
Example Output: Jane, Mother

Example Input: Sentence1: Morgan had no way to make a fire. Sentence2: Night approached making everything cold. Sentence3: He came up with an idea. Sentence4: He used glycerin from a suppository for a chemical reaction. Sentence5: It wonderfully made a nice flame!
Example Output:
Morgan