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: I went ice skating with my friends. Sentence2: That was the first time I had ever been skating. Sentence3: My friends, on the other hand, were experienced skaters. Sentence4: They were teaching me to do a spin when I fell and hurt my wrist. Sentence5: I went to a doctor, who told me my wrist was sprained.
I (myself), Friends