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