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: Skip is has a miserable marriage. Sentence2: He asks his wife for a divorce. Sentence3: She agrees. Sentence4: They both sign divorce papers. Sentence5: Skip is finally divorced from his wife.
Example Output: Skip, Wife, Divorce

Example Input: Sentence1: Annie had a test on Monday. Sentence2: She went bowling on Friday. Sentence3: She went to the mall on Saturday. Sentence4: She watched TV on Sunday. Sentence5: Annie failed her test.
Example Output: Annie

Example Input: Sentence1: I can't seem to get any work done when pop music is playing. Sentence2: But when classical music is playing I seem to work like a machine. Sentence3: Last week I was listening to classical radio and flying through work. Sentence4: My boss changed the channel to a station with music that had lyrics. Sentence5: My work slowed to a sluggish pace and I couldn't focus at all.
Example Output:
I (myself), My boss