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: Melinda heard a noise. Sentence2: There was a burglar in her house! Sentence3: She called the police. Sentence4: They rushed over and arrested him. Sentence5: Melinda no longer felt safe.

Output: Melinda, Burglar, Police

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: Tom had been at the casino all day. Sentence2: He lost at everything he tried. Sentence3: He had been drinking and was frustrated. Sentence4: He went to the roulette table and bet what he had left on black. Sentence5: He lost that too.
Output: Tom