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: The family arrives at the beach. Sentence2: Everyone puts on sunscreen. Sentence3: The son plays in the clear water. Sentence4: The daughter builds sand castles. Sentence5: The parents relax for the rest of the day.

Ex Output:
The parents, The daughter, The family, The son

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: Donald loved to comb his hair. Sentence2: He combed it every day to look good. Sentence3: One day, he could not find his comb. Sentence4: Daniel searched everywhere for his comb. Sentence5: Eventually, Daniel found his comb in his bathroom.

Ex Output:
Donald, Daniel