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.

Example Input: Sentence1: Janet was cooking thanksgiving dinner for the first time. Sentence2: She was nervous about it. Sentence3: When it came time to eat the turkey it was too dry. Sentence4: Everyone had trouble chewing. Sentence5: Janet was mortified by the mistake.
Example Output: Turkey, Everyone, Janet

Example Input: Sentence1: On a Friday night, Bobby wanted to hang out with his friends. Sentence2: All of his friends were busy tonight though. Sentence3: So Bobby made imaginary friends. Sentence4: Bobby hung out with his imaginary friends. Sentence5: Later Bobby went to sleep and was happy with his new squad.
Example Output: Friends, Imaginary friends, Bobby

Example Input: Sentence1: I had a big paper due last week. Sentence2: It was supposed to be fifteen pages long. Sentence3: I didn't start working on it until a few days before it was due. Sentence4: That was a big mistake. Sentence5: I had to stay up all night to get it done.
Example Output:
I (myself)