{{ 1,-1,0.004,0.006}{ 2,1,0.004,0.006}{ 3,2,0.004,0.006}{ 4,3,0.004,0.006}{ 5,4,0.004,0.006}{ 6,5,0.004,0.006}{ 7,6,0.004,0.006}{ 8,7,0.004,0.006}}