Given the task definition, example input & output, solve the new input case.
In this task, you're given an input that contains two words, and your task is to predict the correct preposition that connects these two words. Predict the preposition that explicitly conveys both words' meaning, e.g., Word1: king 
 Word2: fort: "king of fort". Possible prepositions are: "of", "on", "in", "for", "from", "about", and "with".
Example: Word1: story 
 Word2: pearl
Output: of
The preposition correctly connects two words turning it into the sentence 'story of pearl'.

New input case for you: Word1: novel 
 Word2: mystery
Output:
of