Definition: In this task, you're given five sentences, numbered 1 through 5. Your job is to generate a title for the story that makes complete sense. The title must be short, with less than three words, use simple language, and include the main topic of the story.
Input: Sentence 1: Lou was walking home from school. Sentence 2: A person he didn't know tried to have a conversation with him. Sentence 3: Lou remembered what his mom said about strangers when he was alone. Sentence 4: Lou refused to talk to the stranger. Sentence 5: He then went home quickly and safely.

Stranger.