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: Holly had an issue with her laptop. Sentence2: She let her sister use it, and she accidentally downloaded a virus. Sentence3: Holly ran antivirus software to see if she could remove it. Sentence4: The antivirus software did not fix the problem. Sentence5: Holly had to take her laptop to tech support to get it fixed.
Output:
Holly, Her sister, Tech support