What game do the girls start to play on page 75, and how is it played?

Rose and Windy start to play the game M.A.S.H. The letters stand for Mansion, Apartment, Shed, House. It is played by creating a grid and writing information like a boy's name and counting to decide how many kids. Then that information is supposed to determine who Rose will marry, where she will live, and how many kids she will have.