Instructions: 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.
Input: Sentence1: We use Peapod quite often. Sentence2: Recently peapod changed their website. Sentence3: I did some shopping, then signed off. Sentence4: Peapod said my cart was saved, but in fact it was not. Sentence5: I am mulling over using another service.
Output:
I (myself), Peapod, Another service