c status 10
c --eliminateinit=0
c --eliminateocclim=1
p cnf 8 9
8 5 0
8 4 3 0
2 7 0
1 -4 0
-6 -7 0
7 -8 0
3 4 6 0
-3 -2 -5 0
-1 5 0