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: Bob hated his current cable provider. Sentence2: He decided to cancel the services. Sentence3: He started looking for a new provider. Sentence4: He found a great deal and bought it. Sentence5: His new provider was great!
Example Output: Bob, Bob's new cable provider

Example Input: Sentence1: Bob called Erica to ask her to a Valentine's Day date. Sentence2: She told him yes that she would love to go with him. Sentence3: He was excited about the upcoming date. Sentence4: He planned everything for the perfect night. Sentence5: When he picked her up she was smiling and happy.
Example Output: Bob, Erica

Example Input: Sentence1: Our old cat became very ill. Sentence2: My family knew that we would have to put her to sleep. Sentence3: The job fell to me, as I was the Dad. Sentence4: My family was crying as I drove away with our sick cat. Sentence5: On the way home from the vet I also cried.
Example Output:
I (myself), Vet, Cat