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: A woman was walking. Sentence2: She sat on a bench. Sentence3: There was a man next to her. Sentence4: She realized it was her ex husband. Sentence5: This must have been accidental.

Output: Ex husband, A woman, A man

Input: Consider Input: Sentence1: Rivera was disgusted by eggplants. Sentence2: He did not like the color of them at all. Sentence3: One day, there was nothing in his house except eggplants. Sentence4: He was forced to eat it and he liked it. Sentence5: Now, Rivera likes eating eggplants.

Output: Rivera

Input: Consider Input: Sentence1: Mary was nervous about the first day of school. Sentence2: On the bus and met a girl named Bethany. Sentence3: The two girls had a lot in common. Sentence4: They played together every day. Sentence5: The two girls became best friends.
Output: Bethany, Mary