v 200 200 0 v 200 -200 0 v 200 -200 -4 v 200 200 -4 v -200 200 0 v -200 200 -4 v -200 -200 0 v -200 -200 -4 vt 0 1 vt 0 1 vt 0 1 vt 0 1 vt 0 1 vt 0 1 vt 0 1 vt 0 1 vt 0 1 vt 0 1 vt 0 1 vt 0 1 vt 0 1 vt 0 1 vt 0 1 vt 0 1 vt 0 0 vt 1 0 vt 0 1 vt 1 1 vt 0 0 vt 1 0 vt 0 1 vt 1 1 f 1/1 2/2 4/3 f 4/3 2/2 3/4 f 5/5 1/6 6/7 f 6/7 1/6 4/8 f 7/9 5/10 8/11 f 8/11 5/10 6/12 f 2/13 7/14 3/15 f 3/15 7/14 8/16 f 6/21 4/22 3/24 8/23 v -50 270.7 70.7 v 50 270.7 70.7 v 50 200 0 v -50 200 0 v -50 270.7 66.7 v 50 270.7 66.7 v 50 200 -4 v -50 200 -4 vt 0 1 vt 0 0 vt 1 0 vt 1 1 vt 0 1 f 10/1 11/2 15/3 14/4 f 9/4 10/8 14/7 13/8 f 12/9 9/10 13/11 16/12 f 11/13 12/14 16/15 15/16 f 12/26 11/27 10/28 9/25 f 13/13 14/14 15/15 16/16