a-ak aaaa aaab aaam aaas aaba aabb aabm aaka aama aamb aams aasa aasm aass abaa abab abak abam abas abb- abba abbb abbs abma abmb abms abs- absa abss akaa akam akas akka aksa amaa amam amas amb- amba ambs amka amm- amma amsa amss asaa asab asak asam asas asba asbm aska asks asma asmm asms assa assk asss baaa baak baam baas baba babb babm babs bak- baka baks bama bamb bamm bams basa bask bass bbas bbbb bbbs bmaa bsaa bsam bsas bsms bssm kaaa kaab kaak kaam kaas kaba kabb kaka kakk kakm kaks kam- kama kamb kamm kams kas- kasa kasb kask kasm kass kbaa kbab kbak kbam kbas kbba kbbb kbbk kbbm kbbs kbkb kbkk kbmb kbms kbsa kbsb kbsk kbsm kbss kkaa kkam kkba kkbb kkbs kkkk kkma kkmk kkms kksa kksm kkss kmak kmam kmas kmbs kmkk kmks kmmk kmmm kmms kmsa kmsb kmss ksab ksak ksam ksas ksba ksbs kska kskb kskk ksks ksma ksmb ksmm ksms kssa kssm ksss maaa maak maam maas maba mabs maka maks mama mams masa mask mass mbam mbas mbba mbbs mbms mkak mkks mksm mmaa mmab mmas mmmm mmms msaa msas msba msma msmb msmm msms mssa mssm saab saak saam saas saba sabb sabs saka sakb sakk saks sam- sama samm sams sasa sask sasm sass sbaa sbas sbbs sbma sbsa skab skss smaa smak smas smba smkb smss ssaa ssab ssam ssas sssa sssb sssm ssss