Q: 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: Ryan was having trouble falling asleep at night lately. Sentence2: He would lay in bed wide awake for hours. Sentence3: It was affecting his job and performance throughout the day. Sentence4: He started taking Melatonin before bedtime. Sentence5: He started sleeping better immediately.
A:
Ryan