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".

Input: Consider Input: Word1: mass 
 Word2: rock

Output: of


Input: Consider Input: Word1: signs 
 Word2: crematoria

Output: of


Input: Consider Input: Word1: division 
 Word2: research


Output: of