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: I was taking a long business trip one evening. Sentence2: I got terribly lost and my cell phone had died. Sentence3: It was dark and began to rain and I felt myself getting very anxious. Sentence4: I pulled into a gas station and asked for directions. Sentence5: In an hour I arrived safely at the hotel and fell asleep!

Ex Output:
I (myself)

Ex Input:
Sentence1: Evelyn and Robert moved into a new home. Sentence2: Evelyn bought a few houseplants to liven up the place. Sentence3: Then a friend who was moving away gifted Evelyn some of his plants. Sentence4: Soon, everyone thought Evelyn was a plant fanatic. Sentence5: Now, everyone gives Evelyn house plants as gifts.

Ex Output:
Evelyn, Robert, A friend, Everyone

Ex Input:
Sentence1: Simy heard her mom speaking to her grandma about a lost letter. Sentence2: She asked her mom what happened. Sentence3: Her mom said her grandma had lost a special letter from her grandpa. Sentence4: Simy felt sad but soon forgot as she played. Sentence5: While putting her toys away she found the letter on a toy shelf.

Ex Output:
Simy, Grandpa, Mom, Grandma