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