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: Calvin was so excited! Sentence2: His friends were coming over for a birthday party. Sentence3: He cleaned his room and decorated the play room. Sentence4: They came over and brought him gifts. Sentence5: He had a great time!
Example Output: Friends, Calvin

Example Input: Sentence1: Evelyn moved away to college on her own. Sentence2: She felt very homesick and missed her friends. Sentence3: Eventually, she decided to join a student organization. Sentence4: She met a lot of people and made a few friends. Sentence5: Evelyn didn't feel so homesick any more.
Example Output: Evelyn, Friends

Example Input: Sentence1: Nita and her husband were thrilled to find they were expecting. Sentence2: But Nita wanted a girl and her husband wanted a boy! Sentence3: Then the ultrasound revealed that Nita carried twins - fraternal. Sentence4: Each partner was getting their dream! Sentence5: Nita and her husband were so happy, they cried!
Example Output:
Nita and her husband, Nita, Husband