A = (2, 7)
B = (4, 7)
C = (4, 4)
D = (10, 4)
E = (10, 5)
F = (10, 8)
G = (9, 8)
H = (9, 5)
I = (5, 5)
J = (5, 7)
K = (5, 8)
L = (2, 8)
f = Segment(A, B)
g = Segment(B, J)
h = Segment(L, A)
i = Segment(L, K)
j = Segment(K, J)
k = Segment(J, I)
l = Segment(B, C)
m = Segment(C, D)
n = Segment(D, E)
p = Segment(E, F)
q = Segment(F, G)
r = Segment(G, H)
s = Segment(H, I)
t = Segment(H, E)