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: Stella worked for a super demanding boss. Sentence2: He would never give her affirmations for the hard work she did. Sentence3: Stella felt incredibly unhappy with her life. Sentence4: She was certain she deserved more praise for all she did. Sentence5: Stella filed a discrimination claim against her boss.
Output:
Stella, Boss