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: Todd has been in the hospital for many days. Sentence2: The doctors say there is sign of recovery. Sentence3: His family is planning for the worst. Sentence4: Later in the week Todd's doctor said he was pulling the plug. Sentence5: Todd was pronounced at at 6 pm today.

Ex Output:
Family, Doctors, Todd

Ex Input:
Sentence1: I walked to my classroom. Sentence2: I was confused since no person waiting outside of the room. Sentence3: My friend eventually came. Sentence4: He told me that class was cancelled for today. Sentence5: I started to head home.

Ex Output:
I (myself), Friend

Ex Input:
Sentence1: My neighbor asked me to attend a concert with her. Sentence2: It was a group of old-time fiddlers playing for a festival. Sentence3: My mother's family used to sit and sing mountain music every night. Sentence4: I wasn't sure I would like the fiddlers' music. Sentence5: In fact, I loved it because I recognized some of the tunes!

Ex Output:
I (myself), Mother's family, Neighbor, Fiddlers