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: Jane saw a squirrel as she stood in her yard. Sentence2: The squirrel was busy gathering nuts for the winter. Sentence3: Jane thought she would try to catch the squirrel. Sentence4: Jane ran towards the squirrel and it was frightened! Sentence5: Jane learned that squirrels are fast.
Jane, Squirrel