Given the task definition and input, reply with output. 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: The smoke permeated the entire room. Sentence2: I could feel it getting hotter with the door closed. Sentence3: I didn't say anything because I didn't want to be offensive. Sentence4: I felt like my nostrils were closing up on me. Sentence5: I could barely breathe from all the smoke.
I (myself)