-ana a-un aaaa aaab aaac aaan aaba aabb aabc aaca aacb aacc aacn aaco aacu aana aaon aaoo abaa abab abac aban abau abb- abba abbb abbo abca abcb abcc abcn abnu aboa abob abon aboo abou abua abun acaa acab acac acan acba acca accc acco accu acoa acon acou acu- acuo ana- anaa anab anac anan anao anau anba anbb anbo anbu anca ancc anco anna annb anno ano- anoa anon anua anub anun aoba aoca aonb aono aoun auaa auca auna baaa baan baba babb babo babu bac- baca bacc bacn baco bana banc bann bano banu baon bau- bbau bbbb bcaa bcbc bcca bccc bcnu bcuc bnoc boab boac boan boba bobb bobo bobu boca boco bocu bona bonc bonn bono bonu boob booc boon boua boun buba bubb bubo bubu buca bucc buco bucu buna bunb bunn buno bunu buon c-bo caaa caab caac caan caba cabo cabu cac- caca cacc caco cana canc cann cano cauc cauo cbac cbbc cbca cbcc cbcn cbcu cbna ccaa ccab ccac ccba ccbc ccbn ccca cccb cccc cccu ccna ccnb ccnc ccnu ccob ccoc ccuc cnaa cnac cnbc cnco cnna coan coba cobb cobo cobu coca coco cocu con- cona conc conn cono coob coon coua coub coun cuan cuau cub- cuba cubb cuca cucc cucn cuna cuno cuon naaa naab naac naan naba nabc nabo nabu naca nacc naco nan- nana nanb nann nano nanu naoc nauo nbaa nbbc nbbo nbca nbcc nbco ncaa ncac ncba ncbc ncca nccc nccn nccu ncna ncnc ncoa ncoc ncua nnnn noaa noac noba nobc nobo nobu noco non- nona nonn nono nonu noo- noob noon nooo noun nuan nuba nubc nuca nucu nuna nunc nunn nuno nuoc nuon oaau oban obba obbo obon ocab ocac ocan ocbc occa occc occn ocna ocon onab onan onc- onca onco onna onno onon ooaa ooba oona oooo ouac ouan oucc oun- ouna ouu- uabc uaca uaoc uaua ubac ubba ubbo uboc ubon ucan ucbc ucca ucon ucua unaa unac unan unau unca uncc unco unna unno unon uocc uuno uuoc uuuu