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.
Input: Sentence1: Louisa wanted to go on a scavenger hunt. Sentence2: She went on one with her friends. Sentence3: The girls started finding many objects. Sentence4: After an hour, they were done. Sentence5: When they were done they won a prize.
Output:
Louisa, Her friends