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: Ted had to have back surgery. Sentence2: He had been in pain for a long time. Sentence3: The doctor recommended surgery before any other option. Sentence4: Ted was nervous, but would be glad to be pain free. Sentence5: Ted left for the hospital early.
Ted, Doctor