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: John was in a department store looking for some jeans. Sentence2: John took a pair and began searching for the dressing rooms. Sentence3: John searched all over the men's department, with no luck. Sentence4: John asked for help and learned the rooms were in the ladies' area. Sentence5: John had to try on his jeans where they kept the bras and dresses!
John