# 4,2,1,1
-2.000000000000000000e+00
-1.000000000000000000e+00
2.000000000000000000e+00
-7.000000000000000000e+00
0.000000000000000000e+00
0.000000000000000000e+00
6.000000000000000000e+00
-6.000000000000000000e+00