20 20 1 10
13 0
-7 -12
-7 5
-2 -5
-12 -2
12 14
3 -3
-4 7
6 -4
-10 -12
-2 -2
-9 1
-10 -2
10 -2
-10 -18
-14 -2
-8 -4
-2 6
-14 -12
-15 -12