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: I decided to play scrabble today. Sentence2: I was bored so I played against the computer. Sentence3: When I was done, I ended up winning. Sentence4: The computer lost. Sentence5: I then proceeded to play again.
Output:
I (myself), Computer