0
2 1
0
2 1
-1
2 2
-1
2 2
0
2 1
0
2 1
1
1 1
0
1 2
0
1 2
1
1 1
1
1 1
0
1 2
0
1 2
1
1 1
1
1 1
-1
2 2
0
2 1
0
2 1
0
2 1
0
2 1
1
1 1
IMPOSSIBLE