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: Ryan and Nick went golfing. Sentence2: Nick hit a ball into the water. Sentence3: He was all out of balls! Sentence4: Luckily, Ryan had an extra ball. Sentence5: The two friends continued to finish their round.
A:
Nick, Ryan