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: Jason grew up riding motorcycles. Sentence2: He won his first motorcycle race at the age of 13. Sentence3: He kept racing and improving. Sentence4: Kawasaki sponsored him at the age of seventeen. Sentence5: Jason said that gave him to confidence to win the motocross.
Example Output: Kawasaki, Jason

Example Input: Sentence1: I was having trouble finding my comfortable slippers. Sentence2: I looked everywhere for them. Sentence3: I found them on my wife's feet. Sentence4: She told me she found them in the living room. Sentence5: Finders keepers, she told me.
Example Output: I (myself), My wife

Example Input: Sentence1: Kim's dad hated her boyfriend. Sentence2: She really liked him. Sentence3: Eventually things got too frustrating at home. Sentence4: Kim decided to move out. Sentence5: She moved into an apartment with her boyfriend.
Example Output:
Kim, Boyfriend