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: Merdis didn't want to waste her vote on someone she didn't like. Sentence2: She went to the library to research other options. Sentence3: The librarian directed Merdis to the city's Election Board. Sentence4: They explained in detail to Merdis what her options were. Sentence5: Merdis decided to vote herself in as a candidate in the upcoming race.

Output: Librarian, Merdis

Input: Consider Input: Sentence1: Hank was at his high school basketball match. Sentence2: During half time, someone from the other team offered him candy. Sentence3: Hank gladly accepted the candy. Sentence4: But he started feeling bad when the game resumed. Sentence5: Hank regret eating the candy.

Output: Hank, Someone

Input: Consider Input: Sentence1: Tim went to the store. Sentence2: He looked through the aisles on what to buy. Sentence3: He settled on a candy bar. Sentence4: He brought the candy to the clerk and tried to pay for it. Sentence5: Tim didn't end up getting it because it was too expensive.
Output: Tim, The clerk