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: 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.
Example output: I (myself), Dog
Example explanation: There is only two characters in given story, i.e., I (myself) and dog.
Q: 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.
A:
I (myself), My boss