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: Alex was at the lake with his family. Sentence2: Some of the people were out on a boat. Sentence3: Suddenly an intense storm came rolling in. Sentence4: Everyone was worried about the people in the boat. Sentence5: Luckily, they had stopped on a beach and kept themselves safe.

Output: Some of the people, His family, Alex

Input: Consider Input: Sentence1: Jimmy woke up early. Sentence2: As he ate breakfast, he read the note from him mom to mow the yard. Sentence3: It was already getting hot so he went into the garage for the mower. Sentence4: After gassing it up, he mowed the backyard quickly. Sentence5: He got to have a treat for finishing his chore.

Output: Jimmy, Mom

Input: Consider Input: Sentence1: I bought a sewing machine because I wanted to learn how to sew. Sentence2: My first project was to make a simple bag. Sentence3: It turned out really well. Sentence4: I've made many projects over the years. Sentence5: The best project was a party dress that I made out of satin last year.
Output: I (myself)