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: It was Jordan's birthday. Sentence2: His mother was buying him a cake. Sentence3: Jordan's mother bought a strawberry cake. Sentence4: He had wanted a chocolate cake. Sentence5: Jordan had a tantrum about the cake.

Ex Output:
Jordan, Jordan's mother

Ex Input:
Sentence1: Tom moved out to the coast. Sentence2: He experienced his first earthquake. Sentence3: It was a minor one. Sentence4: Tom freaked out. Sentence5: His friends made fun of him.

Ex Output:
Friends, Tom

Ex Input:
Sentence1: I came out of my class and walked to my locker. Sentence2: I pressed my foot on a broken tile and fell on the ground. Sentence3: At first, no one was willing to help me up. Sentence4: However, one of the teachers around the area helped me get up. Sentence5: She took me to the school's nurse.

Ex Output:
I (myself), Nurse, Teacher