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: Consider Input: Sentence1: Jim got a brand new car. Sentence2: He had purchased the car off of his neighbor. Sentence3: The car needed an oil change. Sentence4: Jim took his car to the mechanic. Sentence5: After the oil change, his car ran like brand new.

Output: Jim, Mechanic, Neighbor

Input: Consider Input: Sentence1: Jan lived in an apartment in town. Sentence2: The apartment didn't have any air conditioning or fans. Sentence3: It was a hot and steamy afternoon. Sentence4: Jan decided to open a window to get some air moving. Sentence5: Now Jan's cats are missing.

Output: Jan, Jan's cats

Input: Consider Input: Sentence1: Stu forgot he had a paper due. Sentence2: Stu remembered two days before the paper was due. Sentence3: He spent the last two days writing as much as he could. Sentence4: Stu turned in what he had done on the due date. Sentence5: Stu got a D on the paper.
Output: Stu