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: Leanna was the smartest student in her class, nothing was hard. Sentence2: She grew to become a conceited person based on her academical prowess. Sentence3: She loved that many of her friends were jealous of the attention. Sentence4: One day her best friend caught her cheating and told everyone. Sentence5: Her reputation was forever ruined and she wasn't considered smart.

Ex Output:
Her best friend, Her friends, Leanna, Class

Ex Input:
Sentence1: Sally got to work making Christmas cookies. Sentence2: She rolled out the dough and cut out shapes. Sentence3: She baked the cookies and decorated each one. Sentence4: Sally thought the cookies were too pretty to eat. Sentence5: So she strung them on yarn and hung them on her tree.

Ex Output:
Sally