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.

Ex Input:
Sentence1: Casey was a secretary at a leasing office. Sentence2: There was a new hire, Savannah, whom Casey quickly became friends with Sentence3: Until the day Casey was running about one hour late to work. Sentence4: Savannah called the boss to tell on Casey. Sentence5: Casey and Savannah are not friends anymore.

Ex Output:
Casey, Savannah, Boss

Ex Input:
Sentence1: Jenny's dad took her to the pound to pick out a kitten. Sentence2: She found the perfect kitten but there was a problem. Sentence3: Her kitten was in the same cage as a friend. Sentence4: She didn't want to break them up. Sentence5: She was delighted when her dad said they could take both home.

Ex Output:
Jenny's dad, A friend, Jenny, A kitten

Ex Input:
Sentence1: Ora wanted to learn to play tennis. Sentence2: She asked her mom for lessons. Sentence3: The two ladies played together every day. Sentence4: At first Ora was terrible. Sentence5: But soon she was playing tennis like a pro!

Ex Output:
Ladies, Mom, Ora