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: Allie had been using her phone all day. Sentence2: But then she realized she had no charge. Sentence3: She was so disappointed. Sentence4: But then she saw a portable one near her. Sentence5: She was relieved.
Output:
Allie