x1 x2 x3 y
-1 -1 0 18.3
-1 1 0 22.2
1 -1 0 23
1 1 0 23
-1 0 -1 3.3
-1 0 1 19.3
1 0 -1 19.3
1 0 1 20.3
0 -1 -1 13.1
0 -1 1 23
0 1 -1 20.9
0 1 1 21.5
0 0 0 22
0 0 0 21.3
0 0 0 22.6