c NCTF
e g g h a b b c b b a h h g f e e
d c b
b h g f e d c a h g f e c b h e d
h d b
g e f d g d a f d a f c h e
b g d
a f c h d a f b g d h a f a f
b f b
f b f b f a e a e h a e f c g
g c h
d h d h d h d h c g c g b f b
f a d
h d g b f a d e h c e g b b e
h c e
h b e g a d f a c f h f h b g
a c d
