8 8
   0    1    0    0    0    0   -1 1481 
   0    0    1    0    0    0   -1 1481 
   0    0    0    2    7    0    0  -15 
   0    0    0    0    0    1    0  -23 
   1    0    0    0    1    0    0    0 
   1    0    0    0   -1    0    0    2 
   1    0    0    0    0    0    1 -1481 
   1    0    0    0    0    0    0    1 

0 4
