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.

Sentence1: Ron liked his new apartment, but it was pretty hot in there. Sentence2: He couldn't afford air conditioning and summer was coming. Sentence3: He was complaining to his friend, Len, who offered a solution. Sentence4: Len had an old window air conditioner he didn't use anymore.
Len helped Ron install it and the place became cool and comfortable.