v -90 90 -1 v -90 90 1 v 90 90 1 v 90 90 -1 v 90 -90 1 v 90 -90 -1 v -90 -90 1 v 0.9 -0 0 v -0.9 -0 0 v 0.9 0 0.018 v -0.9 0 0.018 v -90 90 -1 v -90 90 1 v 90 90 -1 v 90 -90 1 v 90 -90 -1 v -90 -90 -1 v -90 -90 1 v 0.9 0 -1 v -0.9 0 -1 vt 0 0 vt 1 0 vt 1 1 vt 0 1 vt 0 0 vt 1 0 vt 1 1 vt 0 1 vt 0.017 1 vt 0 1 vt 0 0 vt 0.017 0 vt 0 0 vt 0.017 0 vt 0.017 1 vt 0 1 vt 0 0 vt 0.123 0 vt 0.123 0.127 vt 0 0.127 vt 0.017 1 vt 0 1 vt 0 0 vt 0.017 0 vt 0.017 0 vt 0.017 1 vt 0 1 f 7/1 5/2 3/3 2/4 f 8/5 9/6 11/7 10/8 f 1/9 2/10 3/11 4/12 f 4/13 3/14 5/15 6/16 f 16/17 17/18 12/19 14/20 f 17/21 18/22 13/23 12/24 f 16/17 15/25 18/26 17/27