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: When the little boy went home, he couldn't find his mother or father. Sentence2: He looked all around. Sentence3: He called their names but no one answered. Sentence4: Eventually a neighbor heard him. Sentence5: She said his parents were at her home.

Ex Output:
Mother, Father, Neighbor, The little boy

Ex Input:
Sentence1: Scarlett, in spite of her name, didn't like the color red. Sentence2: He parents always bought her red dresses and red ribbons. Sentence3: What she wanted the most was something that was green. Sentence4: She asked for a green dress on her birthday. Sentence5: But she received a red one and sighed with sadness.

Ex Output:
Scarlett's parents, Scarlett

Ex Input:
Sentence1: Nick poured himself a bowl of cereal. Sentence2: After, he found out he was out of milk. Sentence3: Nick decided to try putting orange juice in his cereal instead. Sentence4: The cereal tasted very strange. Sentence5: He decided he would never pour orange juice into his cereal again.

Ex Output:
Nick