-ana a-ak a-ok aaaa aaab aaan aaav aaba aabb aaka aana aaon aaoo aava abaa abab abak aban abb- abba abbb abbo aboa abob abok abon aboo abov abva akaa akan akao akka akko akna akok akon ana- anaa anab anak anan anao anba anbb anbo ank- anka anko anna annb anno ano- anoa anon aoba aonb aono avab avan avao avon avva avvo baaa baak baan baba babb babo bak- baka bako bana bank bann bano baon bava bbbb boab boak boan boba bobb bobo boka bokn boko bona bonk bonn bono boob book boon bova bovo kaaa kaab kaak kaan kaba kabb kabo kaka kakk kakn kako kana kanb kann kano kanv kaoa kaok kaon kava kavb kavo kavv kbaa kbab kbak kbba kbbb kbbk kbbo kbkb kbkk kbko kbkv kbna kbnn kbno kbnv kboa kbob kbok kbon kboo kbov kbva kbvb kbvo kkaa kkan kkba kkbb kkbn kkbo kkkk kknb kknn kkno kkoa kkob kkon kkoo kkov kkvv knaa knab knan knba knbb knbn knkk knnb knnk knob knok knon knva knvn knvo koab koak koan koba kobb kobk kobn kobo koka kokb kokk kokn koko kona konk kono koob kook koon kooo koov kova kovk kovo kvab kvak kvan kvna kvnn kvno kvoa kvob kvok kvon kvoo kvov kvvn kvvv naaa naab naan naba nabk nabo naka nako nan- nana nanb nann nano nava navo navv nbaa nbak nbbo nkok nnnn noaa noak noba nobo noko non- nona nonn nono noo- noob nook noon nooo noov nov- nova novo obak oban obba obbo obkb obok obon okak okan okka okko okna okno okok okon onab onan onna onno onon ooaa ooak ooba oona oooo ovan ovo- ovon ovoo vaan vaka vana vank vann vano vava vnav voka vona vonk vonn vovk vvob vvvv