-ana aaaa aaab aaan aaav aaba aabb aabt aana aaon aaoo aata aatt aava abaa abab aban abat abb- abba abbb abbo abbt aboa abob abon aboo abot abov abta abva ana- anaa anab anan anao anat anba anbb anbo anna annb anno annt ano- anoa anon ant- anta anto antt antv aoba aonb aono aont at-t ataa atab atan atat atna atno atob aton atot atta attn atto avab avan avao avat avon avot avva avvo baaa baan baat baba babb babo bana bann bano bant baon bata batn bato batt bava bbbb bnta boab boan boat boba bobb bobo bona bonn bono bont boob boon boot bota botb botn boto bott bova bovo btaa btan btob bttb n-tv naaa naab naan naat naba nabo nan- nana nanb nann nano nant naot nata nato natt natv nava navo navv nbaa nbbo nnnn nnot nntn nnvt noaa noat noba nobo non- nona nonn nono nont noo- noob noon nooo noot noov not- nota noto nott notv nov- nova novo ntto nttv nvtv oban obba obbo obon obot onab onan onat onna onno onon ont- onto ontv ooaa ooba oona oont oooo ootb otan oto- oton otoo otov otta otto ovan ovo- ovon ovoo ovot taa- taan taat taba tabb tabo tana tann tano tant taoa tata tatb tato tatt tatv tava tavo tbta toab toan toat toba tobo tobt tona tonb tonn tono tooa toon toot tota toto tott tova tovo ttab ttbb tton tttt tvbn tvnb tvon tvtv vaan vaat vana vann vano vant vata vato vatt vava vnav vnto voat vona vonn vont voot vota voto vvob vvvv