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: I smoked for about ten years, and I was happy with it. Sentence2: There was no need to quit, I'm already old. Sentence3: Other people mistakenly thought that they could help me quit. Sentence4: These folks believed they were helping me. Sentence5: I still smoke, and many people are sad, but maybe I'll quite someday.
Output:
I (myself), Folks, People