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: Cleo went to the beach with her friends. Sentence2: She and her friends built a sand castle near the surf. Sentence3: They decorated it with feathers and shells they gathered. Sentence4: A large wave rolled in. Sentence5: Cleo, her friends and the sand castle were all knocked over.
A:
Friends, Cleo