18 lines (17 with data), 276 Bytes

in4.ine
begin
12 8 integer
10 -8 -1 -2 -3 -3 -2 -2 
10 8 -2 -2 0 0 2 0 
10 -11 3 -2 -1 -1 -1 -3 
5 23 -4 -2 -3 0 0 1 
27 5 -4 -1 3 9 11 -12 
0 1 0 0 0 0 0 0 
0 0 1 0 0 0 0 0 
0 0 0 1 0 0 0 0 
0 0 0 0 1 0 0 0 
0 0 0 0 0 1 0 0 
0 0 0 0 0 0 1 0 
0 0 0 0 0 0 0 1 
end
nonnegative