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: Alice liked to tickle her friends. Sentence2: Usually in the armpits, sometimes the belly. Sentence3: One time she tickled too much. Sentence4: And her friend laughed so hard. Sentence5: She had to change her pants.
A:
Friends, Alice, Friend