Definition: In this task, you're given a four sentences of story written in natural language. Your job is to complete end part of the story by predicting appropriate last sentence which is coherent with the given sentences.
Input: Sentence1: A man went to a business function. Sentence2: He mingled and schmoozed all day. Sentence3: He handed out business cards to everyone he met. Sentence4: When he got home, though, he was mortified.

His fly was open and his shirt misbuttoned.