The formula of words is an intellectual game of logic. The game consists of 2 modes:
Mode #1 (Associations):
You are offered two pictures and need to understand what they are associated with.
For example: lion + throne = king
Mode #2 (What they have in common):
You are offered three pictures and you need to understand what they have in common.
For example: hair cutting + lawn cutting + bush cutting = haircut.