A = (-4, 2)
B = (-2, 4)
a = Vector(A, B)
C = (-2, 0)
D = (0, 4)
b = Vector(C, D)
E = (0, 2)
F = (4, 0)
c = Vector(E, F)
G = (4, -2)
H = (2, -4)
d = Vector(G, H)
I = (4, 2)
J = (8, -2)
X = Vector(I, J)
K = (12, 6)
L = (8, 2)
Y = Vector(K, L)
M = (10, -4)
N = (12, 0)
u = Vector(M, N)
O = (16, 0)
P = (18, 2)
v = Vector(O, P)