3
× 2
1
0
-1
× 2
3
1
0
-1
3
1
0
-1
2
0
× 4
0
-1
2
0
× 2
0
-1
2
0
× 2
0
-1
2
0
× 2
0
-1
2
0
× 2
0
-1
1
× 3
0
× 2
0
-2
1
× 2
0
0
-2
1
× 2
0
0
-2
1
× 2
0
-1
× 2
-2