4
20
1 1 1 1    -1 -1 -1 -1      0  0  0  0          0  0  0  0           0  0  0  0    
0 0 0 0     1  1  1  1     -1 -1 -1 -1          0  0  0  0           0  0  0  0
0 0 0 0     0  0  0  0      1  1  1  1         -1 -1 -1 -1           0  0  0  0
0 0 0 0     0  0  0  0      0  0  0  0          1  1  1  1          -1 -1 -1 -1 
inequalities

1
20
1 1 1 1       1 1 1 1         1 1 1 1      1 1 1 1     1 1 1 1
signs

1
20
1 1 1 1       1 1 1 1         1 1 1 1      1 1 1 1     1 1 1 1
grading