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: I am sitting at a desk. Sentence2: I turned on the computer. Sentence3: There was a picture of a monkey on it. Sentence4: I clicked on the picture of the monkey. Sentence5: I saved it as the background.
Output:
I (myself)