easy Set 8 Grid Puzzle
1
1
2
-1
1
1
1
2
-1
2
1
1
2
-1
-1
2
1
3
-1
1
2
1
1
1
1
3
-1
1
-1
1
1
-1
2
1
1
1
1
1
2
2
2
1
1
1
1
-1
1
1
-1
-1
1
1
1
1
2
2
1
1
1
-1