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.
Q: Sentence1: Cal shivered in a t-shirt as the snow fell on him. Sentence2: The weather forecast had called for seventy degrees and sunny. Sentence3: It was twenty degrees and very cloudy with snow. Sentence4: Cal didn't have time to go back inside and grab a jacket. Sentence5: He ran all the way to his car and turned on the heat full blast!
A:
Cal