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: I was super nervous for my science test yesterday. Sentence2: I studied very hard but it didn't calm my nerves enough. Sentence3: As I walked into the room I wanted the test over with. Sentence4: Finally I started taking the test. Sentence5: Thankfully it wasn't as hard as I thought it would be.

Ex Output:
I (myself)

Ex Input:
Sentence1: Carl needed to lose weight. Sentence2: He found it very hard since he loved candy. Sentence3: He decided he would stop having candy in the house. Sentence4: He found it much easier to lose weight this way. Sentence5: Soon, Carl was down ten pounds and didn't miss eating candy at all.

Ex Output:
Carl

Ex Input:
Sentence1: Gina woke up at 10 am and looked outside. Sentence2: She went back to sleep when she saw the sky was gray. Sentence3: 2 hours later she woke up. Sentence4: She walked passed the windows in the living room. Sentence5: She froze in her tracks when she realized everything was white.

Ex Output:
Gina