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.

Input: Consider Input: Sentence1: Carl needed to lose weight. Sentence2: He found it very hard since he loved candy. Sentence3: He decided he would stop having candy in the house. Sentence4: He found it much easier to lose weight this way. Sentence5: Soon, Carl was down ten pounds and didn't miss eating candy at all.

Output: Carl

Input: Consider Input: Sentence1: Lucy sat at the police station. Sentence2: She'd been lost and a kind stranger brought her here. Sentence3: She sat with puffy swollen tear stained eyes waiting on her grandpa. Sentence4: An officer gave her a soda while she waited. Sentence5: She was so happy to see grandpa when he arrived, she knocked it over.

Output: Grandpa, Lucy, Kind stranger, Officer

Input: Consider Input: Sentence1: Allie was excited to have a sleepover party with all of her friends. Sentence2: She could not wait for her friends to come and party with her. Sentence3: When her friends got there they made their own pizzas. Sentence4: After dinner the girls watched a movie and ate popcorn. Sentence5: By the time it was ready for bed, the girls were exhausted.
Output: Friends, Allie