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: Alex was at the lake with his family. Sentence2: Some of the people were out on a boat. Sentence3: Suddenly an intense storm came rolling in. Sentence4: Everyone was worried about the people in the boat. Sentence5: Luckily, they had stopped on a beach and kept themselves safe.

Ex Output:
Some of the people, His family, Alex

Ex Input:
Sentence1: Jenny's dad took her to the pound to pick out a kitten. Sentence2: She found the perfect kitten but there was a problem. Sentence3: Her kitten was in the same cage as a friend. Sentence4: She didn't want to break them up. Sentence5: She was delighted when her dad said they could take both home.

Ex Output:
Jenny's dad, A friend, Jenny, A kitten

Ex Input:
Sentence1: Jason had wanted to travel to Spain for his whole life. Sentence2: It would be an expensive vacation to take. Sentence3: Jason started saving money for his big trip to Spain. Sentence4: Finally he had enough to book a ticket. Sentence5: Jason had the vacation of his dreams in Spain.

Ex Output:
Jason