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: Jan wanted a new purse. Sentence2: She knew should could not afford the one she wanted. Sentence3: She decided to start saving until she could. Sentence4: Jan finally had enough money. Sentence5: When she went to buy the purse, it was gone.

Ex Output:
Jan

Ex Input:
Sentence1: Jim's son is afraid to fly. Sentence2: He's seen too many stories about plane crashes. Sentence3: He can't sleep the night before they are set to fly to Denver. Sentence4: But by the time he gets on the plane he is exhausted. Sentence5: He is so tired that he sleeps all the way through the flight.

Ex Output:
Jim's son

Ex Input:
Sentence1: I was freezing from the cold weather outside. Sentence2: As a result, I decided to set up a heater in my room. Sentence3: I became more cozy as I moved my arms around the heater. Sentence4: Without paying attention, the tip of my jacket was on the heater. Sentence5: Eventually, that part got burned.

Ex Output:
I (myself)