A: (0, 0)
B = (1, 1)
C = (2, 2)
D = (3, 2)
E = (4, 2)
F = (5, 2)
G = (6, 2)
H = (7, 3)
I = (8, 3)
J = (9, 4)
K = (10, 4)
L: (0, 0)
M: (1, 0)
N: (2, 0)
O: (3, 1)
P: (4, 2)
Q: (5, 3)
R: (6, 4)
S: (7, 4)
T: (8, 5)
U: (9, 5)
V: (10, 6)