A = (1, 13)
B = (1, 6)
C = (6, 12)
D = (7, 9)
E = (11, 11)
s = Line(C, E)
t = Line(B, E)
F = Point(t)
G = Point(s)
r = Line(C, D)
H = Point(r)
I = Point(r)
R1 = Point(r)
R2 = Point(r)
S1 = Intersect(s, yAxis)
S2 = Point(s)
T1 = Intersect(t, yAxis)
T2 = Point(t)