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: I was feeling a little hungry. Sentence2: I decided to make oysters. Sentence3: But first, I had to find some. Sentence4: I went to the beach and began looking. Sentence5: By the end of the day, I had caught twenty oysters!

Output: I (myself)

Input: Consider Input: Sentence1: Gina had inherited a house from her parents. Sentence2: She wanted to sell the house. Sentence3: Gina took out the things that had sentimental value. Sentence4: She found a realtor to sell the house. Sentence5: Gina sold the house to a buyer.

Output: Realtor, Buyer, Gina, Parents

Input: Consider Input: Sentence1: Lyubov decided to enter a photo contest. Sentence2: She went outside to see what kind of weather was outside. Sentence3: Lyubov took a photo of a golden sunset against mountains. Sentence4: She entered the online contest by submitting the file. Sentence5: Lyubov ended up being one of the third-place winners who got $100.
Output: Lyubov