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.

Ex Input:
Sentence1: While he was swimming one day, Jim saw something in the water. Sentence2: He wasn't sure what it was, but he knew it didn't belong. Sentence3: He dove underneath the surface. Sentence4: He pulled the object up to the surface. Sentence5: Jim discovered that the object was a bag of rubber clown noses.

Ex Output:
Jim

Ex 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.

Ex Output:
Rivera

Ex Input:
Sentence1: Sam's car's electric window stopped working on his side. Sentence2: Sam couldn't afford to fix it at the time. Sentence3: He tried to do it himself but wasn't able to. Sentence4: He would have to drive around without being able to roll it down. Sentence5: It was especially annoying when using drive throughs.

Ex Output:
Sam