A,0,0
B,1,0
C,2,0
D,2,1
E,1,1
F,0,1
G,1,2
H,2,2
I,0,2
A,B
B,C
C,D
D,H
H,G
G,E
E,F
F,I
I,A
B,E
E,D
F,G
C,H
