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: Diana sacrificed her sleep to study for her math exam. Sentence2: At one moment, she fell asleep on her table. Sentence3: Diana's mom woke her up in the morning. Sentence4: Diana got mad when she found out that she's late to her exam. Sentence5: She also missed it since there was several traffic on the road.

Ex Output:
Diana, Diana's mom

Ex Input:
Sentence1: I brought my son to the doctors. Sentence2: He was so scared to go. Sentence3: He had to get a few shots. Sentence4: He hates getting shots. Sentence5: He cried the whole time.

Ex Output:
I (myself), Son, Doctors

Ex Input:
Sentence1: Gina's friend Ruth came over her house. Sentence2: She brought a girl Gina disliked named Jane. Sentence3: Jane lived in the nicest house on the block. Sentence4: She only had negative things to say about Gina's house. Sentence5: Gina made sure Ruth knew to never bring Jane to her house again.

Ex Output:
Jane, Gina, Ruth