B: (4, 0, 0)
C: (4, 4, 0)
D: (0, 4, 0)
A: (0, 0, 0)
F: (4, 0, 4)
G: (4, 4, 4)
H: (0, 4, 4)
E: (0, 0, 4)
f = Segment(B, C)
g = Segment(C, D)
h = Segment(D, H)
i = Segment(H, G)
j = Segment(G, C)
k = Segment(B, F)
l = Segment(F, G)
m = Segment(H, E)
n = Segment(E, F)