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: Sharon jumped as an owl hooted off in the distance. Sentence2: She laughed at her fear, and kept walking towards the forest edge. Sentence3: She knew she wouldn't be able to see when the sun went down. Sentence4: She'd become lost in the dark, impenetrable woods. Sentence5: Sharon made it to the safety of the field just as the sun sank.
Output:
Sharon, Owl