Detailed 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.
Q: Sentence1: I have been skipping rocks at the lake. Sentence2: At first I was not very good. Sentence3: I have been practicing and I am becoming very good at it. Sentence4: I can skip the rock eight times before it sinks. Sentence5: My goal is to skip a rock ten times before the end of the summer.
A:
I (myself)