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