Instructions: 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: Sentence1: A hairline crack ran down the middle of the glass. Sentence2: Wren noticed it as she put her wine glass down. Sentence3: She went to the kitchen and got another glass. Sentence4: She poured what was left of her wine into it. Sentence5: Wren carefully through the cracked glass away in the trash.
Output:
Wren