x1	x2	x3	y
-1	-1	-1	17
1	-1	-1	44
-1	1	-1	19
1	1	-1	46
-1	-1	1	7
1	-1	1	55
-1	1	1	15
1	1	1	41
0	0	0	29
0	0	0	28.5
0	0	0	30
0	0	0	27
0	0	0	28