A = (-1, 2)
B = (1, 4)
a = Vector(A, B)
C = (-1, 0)
D = (3, 4)
b = Vector(C, D)
E = (4, 4)
F = (7, 4)
X = Vector(E, F)
G = (13, 4)
H = (8, 4)
W = Vector(G, H)
I = (6, 3)
J = (9, 3)
Y = Vector(I, J)
K = (10, 2)
L = (14, 2)
Z = Vector(K, L)
M = (4, 2)
N = (7, 1)
u = Vector(M, N)
O = (10, 1)
P = (7, 2)
v = Vector(O, P)