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: There was a kid named Tim. Sentence2: Tim had a big yellow snake. Sentence3: The snake always ate big mice and rats. Sentence4: One day the snake got sick and did not eat his food. Sentence5: Tim took him to the veterinarian and he said he was just full.
A:
Tim, Mice, Veterinarian, Snake, Rats