Given the task definition, example input & output, solve the new input case.
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: Sentence1: My dog was bored. Sentence2: I was working all day so I couldn't spend time with him. Sentence3: When I finished work I decided to play with my dog. Sentence4: He was so happy to finally have some fun! Sentence5: Alas, he fell sick and died.
Output: I (myself), Dog
There is only two characters in given story, i.e., I (myself) and dog.

New input case for you: Sentence1: Joel liked being a bully. Sentence2: He was riding his bike when he saw Brandon from class. Sentence3: Brandon rode his bike up to Joel. Sentence4: Joel pushed Brandon off his bike and threw one leg over. Sentence5: As Joel tried riding away on both bikes he immediately fell over.
Output:
Joel, Bike, Brandon