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: Amy was going to the break room to get ice. Sentence2: Her friend Troy was having his lunch. Sentence3: Amy wasn't on break, but decided to chat with Troy anyway. Sentence4: 20 minutes later Amy was still with Troy. Sentence5: She crept back to her desk hoping not to be seen by her boss.

Ex Output:
Amy, Troy, Boss

Ex Input:
Sentence1: Roland came to the bowling alley looking to improve his skills. Sentence2: He paid for 2 hours of bowling as well as premium equipment. Sentence3: Roland hadn't been playing for long when he got his first ever strike. Sentence4: Feeling accomplished, he did his signature dance and ordered food. Sentence5: He managed to do it 3 more times before it was done for the evening.

Ex Output:
Roland

Ex Input:
Sentence1: Suzy just turned twenty one. Sentence2: Hence she wanted to try some wine. Sentence3: It tasted rather good she thought. Sentence4: She ended up buying a few bottles. Sentence5: She drank it with her family.

Ex Output:
Family, Suzy