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: Carlos made a deal with his friend. Sentence2: If he made four three pointers in a row his friend gives him money. Sentence3: His friend agreed. Sentence4: Carlos won the bet. Sentence5: He used the twenty dollars he got to by food.
His friend, Carlos