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: Jim was going on his very first fishing trip with his dad! Sentence2: He had packed his fishing rod and his tackle box. Sentence3: Jim's dad taught him how to bait his hook and cast the line. Sentence4: Soon, Jim felt a tug on his line! Sentence5: Jim reeled in his very first fish on his first fishing trip!
Output:
Jim's dad, Jim