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: Randy was mentally retarded from a car crash early in his life. Sentence2: Randy loved the simple pleasures in life. Sentence3: His mother would take Randy on trips. Sentence4: One day Randy and his mother took a trip to the coast of carolina. Sentence5: Randy was overjoyed when he saw the ocean for the first time.
Randy, Mother

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!
Cal

Sentence1: Steve cooked delicious food on his favorite stove. Sentence2: One day he moved out to a new apartment. Sentence3: Steve had to leave his stove behind. Sentence4: Steve started to burn all of his food. Sentence5: He couldn't cook without his favorite stove.
Steve