-ana a-ak a-ok aaaa aaab aaan aaba aabb aaka aana aaon aaoo abaa abab abak aban abb- abba abbb abbo aboa abob abok abon aboo 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 baaa baak baan baba babb babo bak- baka bako bana bank bann bano baon bbbb boab boak boan boba bobb bobo boka bokn boko bona bonk bonn bono boob book boon kaaa kaab kaak kaan kaba kabb kabo kaka kakk kakn kako kana kanb kann kano kaoa kaok kaon kbaa kbab kbak kbba kbbb kbbk kbbo kbkb kbkk kbko kbna kbnn kbno kboa kbob kbok kbon kboo kkaa kkan kkba kkbb kkbn kkbo kkkk kknb kknn kkno kkoa kkob kkon kkoo knaa knab knan knba knbb knbn knkk knnb knnk knob knok knon koab koak koan koba kobb kobk kobn kobo koka kokb kokk kokn koko kona konk kono koob kook koon kooo naaa naab naan naba nabk nabo naka nako nan- nana nanb nann nano nbaa nbak nbbo nkok nnnn noaa noak noba nobo noko non- nona nonn nono noo- noob nook noon nooo 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