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: Jamie noticed her only hen hadn't laid an egg in over a week. Sentence2: She didn't know much about chickens and thought this was normal. Sentence3: One day her friend came over and looked at the hen. Sentence4: Her friend realized the hen was stressed by a move to a bigger house. Sentence5: Jamie's friend told her when the hen is settled in she'll lay again.
Output:
Hen, Jamie, Chickens, Her friend