Definition: 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: I was up all night studying for an exam and got a terrible ache. Sentence2: I was tossing and turning in bed and didn't know what to do. Sentence3: The pain would not go away. Sentence4: I tried very hard to forget it. Sentence5: Finally I took an Advil and felt better soon.
Output:
I (myself)