-ana aaaa aaab aaan aaba aabb aana aaon aaoo abaa abab aban abb- abba abbb abbo aboa abob abon aboo abza ana- anaa anab anan anao anaz anba anbb anbo anna annb anno ano- anoa anon anza aoba aonb aono aza- azab azan azaz azna azo- azon azoo azza azzo baaa baan baaz baba babb babo bana bann bano banz baon baza bazo bbbb boab boan boaz boba bobb bobo bona bonn bono boob boon booz boza bozo bzzz naaa naab naan naba nabo nan- nana nanb nann nano naza nazo nazz nbaa nbbo nnnn noaa noba nobo non- nona nonn nono noo- noob noon nooo oban obba obbo obon onab onan onna onno onon onoz onza onzo ooaa ooba oona oooo ozan ozna ozon zaan zaba zabo zana zann zano zaza zoan zobo zon- zona zoo- zoon zoza zozo zzzz