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: Matt and Sarah were married only a month ago. Sentence2: They were so happy getting used to the married life. Sentence3: At least they were happy until Matt's mom moved in. Sentence4: She treated Matt and Sarah both like children. Sentence5: Thanksgiving was awkward this year after Matt kicked her out.

Output: Sarah, Matt, Matt's mom

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: Tim was a very clumsy boy. Sentence2: Today, he was running downstairs while holding scissors. Sentence3: He tripped on the last step and fell. Sentence4: The scissors he was holding jabbed him in his leg. Sentence5: Tim cried as he looked at the blood coming out of the cut.
Output: Tim