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: A friend of mine got two kittens. Sentence2: They have six toes on each paw. Sentence3: They are called polydactyls. Sentence4: This type of cat used to be carried on ships. Sentence5: They are considered to be excellent mousers.
A:
Two kittens, A friend