3.999999999999999   -0.5   0.49999999999999994   -0.5000000000000002   0.4999999999999996
0   -0.5   -0.49999999999999994   -0.5000000000000002   -0.4999999999999996
1.9999999999999996   0.5   0.49999999999999994   -0.5000000000000002   -0.4999999999999996
1.9999999999999996   0.49999999999999967   -0.49999999999999994   -0.4999999999999999   0.5000000000000002