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: Alvin's wife had been on a diet. Sentence2: He didn't like any of the food she had been cooking. Sentence3: Alvin would stop and pick up a burger on the way home from work. Sentence4: He ate very little of what she cooked. Sentence5: Alvin's wife lost weight, but he gained it.
Example Output: Alvin, Wife

Example Input: Sentence1: We went to Saint Thomas for our honeymoon. Sentence2: We paid a lot for a luxurious hotel. Sentence3: Our hotel room was infested with large, Caribbean rats. Sentence4: We had to complain multiple times to incompetent hotel management. Sentence5: We finally received a refund.
Example Output: Caribbean rats

Example Input: Sentence1: Ted had a business trip in a city two states away. Sentence2: He was going to fly there. Sentence3: He set his alarm so he would not oversleep. Sentence4: However, his phone's battery ran out and the alarm could not wake him. Sentence5: He overslept and missed his flight.
Example Output:
Ted