"(3x3x3 -- 2sets -- balanced90)	mean_square"
3 2 2
3
-1	1	0	-1
	0	-1	0
	-1	0	1

0	0	-1	0
	-1	5	-1
	0	-1	0

1	-1	0	1
	0	0	0
	1	0	-1
3
-1	-1	0	1
	0	-1	0
	1	0	-1

0	0	-1	0
	-1	5	-1
	0	-1	0

1	1	0	-1
	0	-1	0
	-1	0	1
