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: It was raining when i'm going to school. Sentence2: I left my umbrella on the rack outside the door. Sentence3: After class i noticed one guy took my umbrella. Sentence4: I shout at him why did he get my umbrella but he ignored me. Sentence5: When i look at rack my umbrella is there and i feel so ashamed.
Output:
I (myself), Guy