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: Aya was going on her first plane ride. Sentence2: She was heading to her first job in Japan. Sentence3: She was afraid at first. Sentence4: But when she got on the plane she was pleasantly surprised. Sentence5: Flying, she found, was actually delightful!

Output: Aya

Input: Consider Input: Sentence1: Kia's mom called her out into the yard. Sentence2: Kia went, perplexed. Sentence3: But then she saw what her mom was pointing at. Sentence4: Her mouth fell open in awe. Sentence5: There was a rare and beautiful double rainbow overhead!

Output: Kia, Kia's mom

Input: Consider Input: Sentence1: Elliot loves the cold. Sentence2: Sadly, he lives in Hawaii. Sentence3: After graduating high school he moved to Alaska. Sentence4: He was so happy in the cold. Sentence5: Elliott plans to stay in Alaska forever.
Output: Elliot