fromList [([[0,0]],[1,1]),([[0,1]],[0,1]),([[0,2]],[3,1]),([[0,3]],[2,1]),([[1,0]],[1,0]),([[1,1]],[0,0]),([[1,2]],[3,0]),([[1,3]],[2,0]),([[2,0]],[1,3]),([[2,1]],[0,3]),([[2,2]],[3,3]),([[2,3]],[2,3]),([[3,0]],[1,2]),([[3,1]],[0,2]),([[3,2]],[3,2]),([[3,3]],[2,2])]