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".

Ex Input:
Word1: problem 
 Word2: union

Ex Output:
of


Ex Input:
Word1: lawn 
 Word2: garden

Ex Output:
in


Ex Input:
Word1: side 
 Word2: floor

Ex Output:

of