v	0	0	0
v	8	0	0
v	0	8	0
v	0	0	8
v	4	0	0
v	4	0	4
v	0	0	4
v	4	4	0
v	0	4	4
v	0	4	0
f	1	5	7
f	2	8	6
f	3	10	9
f	3	8	10
f	4	7	6
f	2	5	6
f	5	6	7
f	4	6	9
f	3	8	9
f	8	9	6
f	4	9	7
f	1	10	7
f	10	7	9
f	1	10	5
f	2	8	5
f	8	5	10