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: This morning I started my day full energy. Sentence2: I cleaned the glass coffee and lamp tables. Sentence3: I scrubbed the bathroom like it belonged in a five star hotel. Sentence4: I cooked Tuna Croquettes, Fennel rice and made a strawberry salad. Sentence5: Now it's evening and I am tired with no more energy.

Ex Output:
I (myself)

Ex Input:
Sentence1: Sam wanted to learn how to read. Sentence2: He thought his friends would mock his illiteracy. Sentence3: But when they found out, they were all very kind. Sentence4: They even volunteered to teach him his letters. Sentence5: After months of studying, Sam became a great reader!

Ex Output:
His friends, Sam

Ex Input:
Sentence1: Chelsea's mom had planned the party for months. Sentence2: All of the family was invited. Sentence3: The ceremony was beautiful. Sentence4: They all gathered to celebrate in the backyard. Sentence5: All the planning had been a success!

Ex Output:
Chelsea's mom, Family