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: Anna found a gold ring in the school bathroom. Sentence2: It was lovely and she wanted to keep it. Sentence3: But her conscience would not let her. Sentence4: Instead, she took it to the lost and found room. Sentence5: Soon it was claimed by a very grateful girl!
Output:
Grateful girl, Anna