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: 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: A young lady was running through the sand at the beach. Sentence2: Strong winds started to blow in her direction. Sentence3: She was pushed back. Sentence4: When she fell, her hair fell out. Sentence5: Before anyone noticed, she quickly put it on and walked away.

Output: Anyone, Young lady

Input: Consider Input: Sentence1: Allie wanted to get her dress tailored. Sentence2: So she took it to the shop. Sentence3: She thought it would be rather cheap. Sentence4: But it cost more than the dress. Sentence5: Allie felt badly she had to pay so much money.
Output: Allie, The shop