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: Tina had never tried Pizza before. Sentence2: She had eaten healthy her entire life. Sentence3: So she decided to try a slice. Sentence4: When she tasted it it was amazing. Sentence5: Tina could not believe her tastebuds.

Output: Tina

Input: Consider Input: Sentence1: Jackson decides to watch a professional baseball game. Sentence2: During the game he begins to feel hungry. Sentence3: He eats a hotdog and drinks a beer. Sentence4: After eating he feels too sleepy to watch the game. Sentence5: He goes home to nap before the game is half over.

Output: Jackson

Input: Consider Input: Sentence1: Sheri was wondering why you can sometimes see the moon in daylight. Sentence2: So, not having a computer, Sheri got in her car and drove to a library. Sentence3: Sheri arrived at the library and went inside. Sentence4: She went to the astronomy section and found a book on the moon. Sentence5: Sheri read the book, and now knows why the moon shines in the daylight.
Output: Shen, Sheri