a-ak a-ok aaaa aaab aaas aaba aabb aaka aaoo aasa aass abaa abab abak abas abb- abba abbb abbo abbs aboa abob abok aboo abos abs- absa abss abza akaa akao akas akka akko akok akos aksa aoba aoks aoss asaa asab asak asao asas asba asbo aska asko asks asob asok asos assa assk asso asss aza- azab azas azaz azo- azoo azos azza azzo baaa baak baas baaz baba babb babo babs bak- baka bako baks baos basa bask baso bass baza bazo bbas bbbb bbbs boab boak boas boaz boba bobb bobo bobs boka boko boks boob book boos booz bosa bosk boso boss boza bozo bsaa bsas bsos bzzz k-os kaaa kaab kaak kaas kaba kabb kabo kabz kaka kakk kako kaks kaoa kaok kaos kas- kasa kasb kask kaso kass kaza kazo kazz kbaa kbab kbak kbas kbaz kbba kbbb kbbk kbbo kbbs kbbz kbkb kbkk kbko kbkz kboa kbob kbok kboo kbos kboz kbsa kbsb kbsk kbso kbss kbsz kbzo kbzs kbzz kkaa kkba kkbb kkbo kkbs kkbz kkkk kkoa kkob kkoo kkoz kksa kkss kkzz koab koak koas koaz koba kobb kobk kobo kobs koka kokb kokk koko koks kokz koob kook kooo koos kooz kos- kosa kosb koso koss kosz koza kozb kozk kozo ksab ksak ksas ksaz ksba ksbs ksbz kska kskb kskk ksko ksks kskz ksob ksok ksoo ksos kssa ksso ksss kssz kzaz kzbb kzbk kzbs kzbz kzks kzkz kzoo kzoz kzsb kzza kzzb kzzk kzzo kzzs kzzz oaks oass obak obas obba obbo obkb obok obos obss okak okas okaz okka okko okok oksa okso ooaa ooak ooba oooo ooos oosa osak osas osba osoo osos ossa ossb osso s-os saab saak saas saaz saba sabb sabo sabs sabz saka sakb sakk sako saks saos sasa sask saso sass saza sbaa sbas sbbs sbsa skab skaz skss soak soas soaz soba sobo sobs soka sokk soko sook soos sosa soso soss soz- soza ssaa ssab ssao ssas sssa sssb ssss szob szss zaba zabo zaka zakk zaks zask zaza zobo zoo- zook zoos zoso zoss zoza zozo zsss zzzs zzzz