1
× 7
0
0
-2
1
× 2
0
0
-2
1
0
0
-2
1
0
0
-2
1
0
0
-2
0
× 9
0
0
-2
0
× 4
0
0
-3
0
× 3
0
0
-3
0
× 2
0
-1
-3
0
0
-1
-4
× 4
0
0
-1
-4
× 2
0
0
-1
-4
× 2
0
0
-1
-5
× 9