20
50 0 10
47 15 10
40 29 10
29 40 10
15 47 10
0 50 10
-15 47 10
-29 40 10
-40 29 10
-47 15 10
-50 0 10
-47 -15 10
-40 -29 10
-29 -40 10
-15 -47 10
0 -50 10
15 -47 10
29 -40 10
40 -29 10
47 -15 10
37.00000000000 15.00000000000
-19.00000000000 40.00000000000