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: Fred carefully unhitched the rented trailer. Sentence2: As he went to strap on the chain he noticed a missing link! Sentence3: He ducked under the trailer to find the rest of the chain. Sentence4: Fred hadn't properly set the brake and it rolled backwards. Sentence5: He slowly starved to death and was eaten by wild animals.

Output: Fred

Input: Consider Input: Sentence1: A family settled on a hotel. Sentence2: They got there the next day. Sentence3: Their bags were picked up for them. Sentence4: The lobby was their first view. Sentence5: They thought it was amazing.

Output: A family

Input: Consider Input: Sentence1: I carried my laptop to school although I forgot the charger. Sentence2: My laptop went on power saving mode since 10% of the battery was left. Sentence3: I asked other students if they have a charger. Sentence4: They told me that their type of charger is not the same as mines. Sentence5: I closed my laptop and used my phone as an internet source.
Output: I (myself)