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: Tim was brushing his teeth one morning. Sentence2: Tim noticed he was almost out of toothpaste. Sentence3: Tim decided to go to the store for more. Sentence4: Tim saw natural toothpaste. Sentence5: Tim tried natural toothpaste for the first time.

Ex Output:
Tim

Ex Input:
Sentence1: Neil was in his mother's attic. Sentence2: He found a shoebox full of old family photos. Sentence3: Neil went to a copy service. Sentence4: He made several copies of all the pictures. Sentence5: Neil shared all the pictures with his family.

Ex Output:
Neil, Family, His mother

Ex Input:
Sentence1: Ivy was craving chips. Sentence2: She decided to drive to the store, a mile from her home. Sentence3: Then she remembered that her car was out of gas! Sentence4: Ivy had no choice but to walk all the way there. Sentence5: When she finally got the chips, they tasted all the better!

Ex Output:
Ivy