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: Don showed up for his clarinet lesson. Sentence2: He forgot to bring his music. Sentence3: A teacher told him to play some scales. Sentence4: Don really was not ready for that. Sentence5: After that they played some duets with teacher.

Ex Output:
Don, Teacher

Ex Input:
Sentence1: Carl needed to lose weight. Sentence2: He found it very hard since he loved candy. Sentence3: He decided he would stop having candy in the house. Sentence4: He found it much easier to lose weight this way. Sentence5: Soon, Carl was down ten pounds and didn't miss eating candy at all.

Ex Output:
Carl

Ex Input:
Sentence1: Susie was an aspiring artist. Sentence2: She tried to get her art published in the art museum. Sentence3: For ten Years she painted and got rejected. Sentence4: She finally decided to draw from her heart, and she published it. Sentence5: The art gallery accepted her painting, and she was very happy.

Ex Output:
The art gallery, Susie