You will be given a definition of a task first, then some input of the task.
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.

Sentence1: Gina woke up at 10 am and looked outside. Sentence2: She went back to sleep when she saw the sky was gray. Sentence3: 2 hours later she woke up. Sentence4: She walked passed the windows in the living room. Sentence5: She froze in her tracks when she realized everything was white.
Output:
Gina