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: May was a teacher at a high school. Sentence2: She had come to hate her job. Sentence3: At finals she gave the students a relatively easy assignment. Sentence4: She was shocked to see there was little effort from the students. Sentence5: May decided to just give everyone a passing grade and be done with it.
Example Output: May, The students

Example Input: Sentence1: Jane loved going dancing. Sentence2: Her husband didn't know how. Sentence3: Jane convinced him to take dance lessons. Sentence4: They both went twice a week. Sentence5: After a while Jane's husband was a decent dancer.
Example Output: Jane, They both, Husband

Example Input: Sentence1: Williams loved cake a lot. Sentence2: He loved it so much that he always ate a little. Sentence3: One day, he noticed he was getting fat. Sentence4: He rushed to the doctor. Sentence5: The doctor told him that eating cake would make him fat.
Example Output:
Williams, Doctor