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: The baby in seat 21C started crying. Sentence2: The cry turned into a scream. Sentence3: The scream turned into a piercing scream. Sentence4: John, in seat 20B, minded his own business with earplugs in his ears. Sentence5: The baby calmed down only halfway through the long flight.
Output:
Baby, John