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: Jane loved going dancing. Sentence2: Her husband didn't know how. Sentence3: Jane convinced him to take dance lessons. Sentence4: They both went twice a week. Sentence5: After a while Jane's husband was a decent dancer.

Output: Jane, They both, Husband

Input: Consider Input: Sentence1: Tom went to his friend's house. Sentence2: He got a gatorade bottle off the ground. Sentence3: Tom drank it without thinking. Sentence4: The liquid was disgusting and he spat it out. Sentence5: Tom's friend told him it wasn't Gatorade.
Output: His friend, Tom