 Several polyominoes can tile larger copies of themselves, and repeating this process recursively gives a rep-tile tiling of the plane.For instance, for every positive integer , it is possible to combine copies of the L-tromino, L-tetromino, or P-pentomino into a single larger shape similar to the smaller polyomino from which it was formed.The "compatibility problem" is to take two or more polyominoes and find a figure that can be tiled with each.