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.

Input: Consider Input: Sentence1: Amy was very excited because it was the day of her wedding. Sentence2: Her parents were going to fly in from another country. Sentence3: Amy was worried because their flight was already delayed. Sentence4: In the end they were not able to make it on that day. Sentence5: Amy had to postpone her wedding until the next day.

Output: Amy, Parents

Input: Consider Input: Sentence1: The Greens live in Atlanta. Sentence2: Last week, they traveled to Canada. Sentence3: There was a lot of snow and ice. Sentence4: Wind chills were well below zero. Sentence5: The Greens are happy to be back in warm Atlanta!

Output: Greens

Input: Consider Input: Sentence1: Gus was the team's best hockey player. Sentence2: Gus did not play well in the team's game. Sentence3: Gus gave up a game winning goal to the other team. Sentence4: The team was upset at Gus. Sentence5: Gus retired.
Output: Gus, The other team, The team