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: Todd was trying to grill some burgers one day. Sentence2: His grill was cheap and was producing a ton of smoke. Sentence3: Soon his neighbors came out complaining about the smell. Sentence4: Todd reluctantly put out the flame on his grill. Sentence5: He decided he'd have to wait until he had a better grill.
A:
Neighbors, Todd