2sided pentomino

the goal of the puzzle is to tile the pieces into a 5 x 12 rectangle. the puzzle consists of two sets of 12 pentominoes, which has 1010 configurations for a 5x12 tiling on its own, the puzzle consists of two sets of pentominoes stuck back to back in different tiling. there's one solution. it is quite hard indeed, printing in dual color or surface patterns will make it easier to solve as you can see which side is which.