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.

Sentence1: I bought a new external hard drive. Sentence2: It was large and green. Sentence3: I was careful hooking it up. Sentence4: I started downloading a ton of new games. Sentence5: It's going to take all week for them to load.
I (myself)