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: Laura wanted to play the harp. Sentence2: She signed up for lessons in school. Sentence3: At first it was very difficult to learn. Sentence4: But soon she was playing wonderfully. Sentence5: She played so well, she got a solo in the school concert!

Ex Output:
Laura

Ex Input:
Sentence1: Tina had sampled her mom's wine last night. Sentence2: Her mom had caught her and grounded her. Sentence3: But the next morning, Tina woke with a terrible hangover. Sentence4: She thought that was a far worse punishment than the grounding. Sentence5: Tina vowed never to drink alcohol again!

Ex Output:
Tina, Her mom

Ex Input:
Sentence1: Anna found a gold ring in the school bathroom. Sentence2: It was lovely and she wanted to keep it. Sentence3: But her conscience would not let her. Sentence4: Instead, she took it to the lost and found room. Sentence5: Soon it was claimed by a very grateful girl!

Ex Output:
Grateful girl, Anna