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.

Example Input: Sentence1: Anna was sick of her three TV channels. Sentence2: She called the cable company and made an appointment. Sentence3: Then they came to her house and set up her cable. Sentence4: She was excited to check out her new channels. Sentence5: Anna decided she was going to love having cable!
Example Output: Cable company, Anna

Example Input: Sentence1: Sheena fell asleep last night with gum in her mouth. Sentence2: The gum must have fallen out while she was sleeping. Sentence3: When she woke up this morning she had the gum stuck in her hair. Sentence4: Her mom had to cut the gum out of hair. Sentence5: Sheena's hair looks funny now.
Example Output: Sheena, Her mom

Example Input: Sentence1: Brad was sad. Sentence2: There was no more juice. Sentence3: He didn't want water. Sentence4: His mom suggested he put sugar in water for better taste. Sentence5: Brad was amazed at how wonderful it tasted.
Example Output:
Mom, Brad