The object of "Maintain Your Brain Vocabulary Builder Threesome Edition" is to find the same 3 letters which either begin or end a selection of words in a grid. Each puzzle is a 3x3 grid with 3 partial words in the first and last columns. You solve the puzzle by determining which 3 letters fit at the end of the words on the left column, and which also fit at the beginning of the words on the right column. The 3 letters in your solution cannot be switched around to solve the puzzle.
Maintain your brain with my Threesome edition; A great game for building and testing your vocabulary and only 99 cents.