-ana a-ak aaaa aaab aaan aaas aaba aabb aaka aana aasa aass abaa abab abak aban abas abb- abba abbb abbs abs- absa abss akaa akan akas akka akna aksa ana- anaa anab anak anan anas anba anbb ank- anka anna annb anns ansa asaa asab asak asan asas asba aska asks assa assk assn asss baaa baak baan baas baba babb babs bak- baka baks bana bank bann bans basa bask bass bbas bbbb bbbs bnas bnss bsaa bsas bsns kaaa kaab kaak kaan kaas kaba kabb kaka kakk kakn kaks kana kanb kann kans kas- kasa kasb kask kasn kass kbaa kbab kbak kbas kbba kbbb kbbk kbbs kbkb kbkk kbna kbnn kbsa kbsb kbsk kbsn kbss kkaa kkan kkba kkbb kkbn kkbs kkkk kknb kknn kkns kksa kksn kkss knaa knab knan knas knba knbb knbn knkk knnb knnk knns knsa knsb knsk knsn knss ksab ksak ksan ksas ksba ksbn ksbs kska kskb kskk kskn ksks ksna ksnb ksnk ksnn ksns kssa kssn ksss naaa naab naan naas naba nabk nabs naka naks nan- nana nanb nann nans nas- nasa nasb nask nass nbaa nbak nbas nnnn nnsa nnss nsaa nskk nsna nssa nssb nsss saab saak saan saas saba sabb sabs saka sakb sakk saks sana sank sann sans sasa sask sass sbaa sbas sbbs sbsa skab skan skn- skss snab snak snas snba snns ssaa ssab ssan ssas ssbn ssns sssa sssb ssss