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: Halie adopted a foster cat. Sentence2: The cat was disturbed, having been abused in her previous homes. Sentence3: Halie put her full effort into retraining her. Sentence4: The cat would not stop scratching and biting people. Sentence5: Halie had to put the cat down.
Output:
Halie, Foster cat