-ana aaaa aaab aaan aaba aabb aana aaon aaoo abaa abab aban abax abb- abba abbb abbo aboa abob abon aboo abox ana- anaa anab anan anao anax anba anbb anbo anna annb anno ano- anoa anon anox aoba aonb aono axan axo- axoa axon axxo ba-x baaa baan baba babb babo bana bann bano baon bbbb bbox boab boan boba bobb bobo bona bonn bono boob boon boox boxa naaa naab naan naba nabo nan- nana nanb nann nano nbaa nbbo nnnn noaa noba nobo non- nona nonn nono nonx noo- noob noon nooo noxa oban obba obbo obon obox onab onan onna onno onon ooaa ooba oona oooo oxa- oxan oxna oxo- oxon oxox oxxo xana xano xbox xoan xoxo xxxo xxxx