6 7
   1   1   0   0   0   0   0
   1   0   1   0   0   0   0
   1  -2  -2   0   1   0   0
   0   0   0   2   0   1   0
   1   0   0   1   0   0   0
   1   0   0  -1   0   0  10
0 4
