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: Barry loved making kites in his spare time. Sentence2: Barry decided to make kite making into a business. Sentence3: Barry was amazed by the number of orders he received. Sentence4: Barry ensured that each kite was made with love and care. Sentence5: Barry was glad he could turn his hobby into a passion.

Ex Output:
Barry

Ex Input:
Sentence1: Dan had a very fine cobblestone walkway. Sentence2: Some of the stones had started to jut out unevenly. Sentence3: Dan got out a shovel and leveled the dirt under them. Sentence4: He tamped them down gently to make them all match. Sentence5: Now the stones in Dan's walkway are all perfectly even.

Ex Output:
Dan

Ex Input:
Sentence1: Sam was using the restroom. Sentence2: He realized there was no toilet paper left. Sentence3: He had to use napkins to clean himself. Sentence4: Sam was uncomfortable. Sentence5: He bought more toilet paper immediately.

Ex Output:
Sam