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: Germaine was a scientist working on a secret NASA project. Sentence2: It was meant to help design a ship that could travel to Mars. Sentence3: He was really attracted to a pretty woman who was his colleague. Sentence4: They finally got together and became very intimate. Sentence5: Months later he learned she was a Russian spy and he was fired.

Output: Colleague, Germaine

Input: Consider Input: Sentence1: Dan dreaded doing back to school shopping with his kids. Sentence2: However, Dan had to purchase new backpacks and shoes for the kids. Sentence3: Dan decided to go to the mall to get the school shopping done. Sentence4: After looking through several stores, Dan didn't find anything. Sentence5: Dan was disappointed that he did not find anything at the mall.

Output: Kids, Dan

Input: Consider Input: Sentence1: I decided I wanted awesome presents for my birthday. Sentence2: I told all of my friends that my gifts had to be 200 dollars. Sentence3: I also said if I didn't like the gift, they couldn't be my friend. Sentence4: The day of my party, I eagerly waited for my gifts. Sentence5: After five hours of waiting I realized no one was coming.
Output: I (myself), Friends, Friend