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.

Ex Input:
Sentence1: The sink in my bathroom broke. Sentence2: I decided that I should fix it myself. Sentence3: After one hour, the sink looked worse than before. Sentence4: I finally decided to call a professional plumber. Sentence5: The plumber fixed the sink in ten minutes.

Ex Output:
I (myself), Professional plumber

Ex Input:
Sentence1: George was playing outside in the backyard. Sentence2: He came across a frog. Sentence3: George grabbed the frog and put it in a jar. Sentence4: He decided to give the frog to his mom as a present. Sentence5: His mom screamed and told George to put it outside.

Ex Output:
George, Mom

Ex Input:
Sentence1: Erin grew up with her dad and brothers. Sentence2: They went fishing a lot when she was young. Sentence3: Erin dreamed of fishing as a job one day. Sentence4: She learned how and trained hard. Sentence5: She eventually bought her own fishing boat and worked for herself.

Ex Output:
Erin, Dad, Brothers