2
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10
-10 10