Given the task definition and input, reply with output. 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: My four-year-old nephew loves to wake us up. Sentence2: This morning his hands were cold. Sentence3: He crawled into bed with us. Sentence4: He put his hands on my back. Sentence5: As I screamed, he yelled cold hands.
Nephew, I (myself)