You will be given a definition of a task first, then some input of the task.
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: Adrielle couldn't wait for her birthday party. Sentence2: All her friends were invited and were going to come. Sentence3: She counted down the days until the Saturday of her party. Sentence4: When she woke up Saturday morning, she felt sick. Sentence5: She had to cancel the party.
Output:
Friends, Adrielle