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: Miles ran track for his school's team. Sentence2: He practiced more than anyone else on the team. Sentence3: He even practiced on weekends. Sentence4: Unfortunately, this did not give his muscles any time to rest. Sentence5: Eventually he hurt himself because he did not take time to rest.
Miles