You will be given a definition of a task first, then some input of the task.
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: Susie had been using a droid phone for quite awhile. Sentence2: She had liked it but was having issues. Sentence3: One day it stopped working. Sentence4: So she got an iPhone instead. Sentence5: Susie liked the iPhone so much better.
Output:
Susie