a-ak aaaa aaab aaam aaar aaas aaba aabb aabm aaka aama aamb aamr aams aara aarm aars aasa aasm aass abaa abab abak abam abar abas abb- abba abbb abbr abbs abma abmb abms abra abrs abs- absa abss akaa akam akar akas akka akr- akra aksa amaa amam amar amas amb- amba ambr ambs amka amm- amma amra amsa amss arab arak aram arar aras arba arbs arka arks arma armm arms arr- arra arrk arrr arrs ars- arsa arsk asaa asab asak asam asar asas asba asbm aska askr asks asma asmm asmr asms asra asrm asrs assa assk assr asss baaa baak baam baar baas baba babb babm babr babs bak- baka bakr baks bama bamb bamm bams bar- bara barb bark barm barr bars basa bask bass bbas bbbb bbbs bmaa brab brak bram bras brka brkb brrm brrr brrs brsb brsr bsaa bsam bsas bsms bsra bsrm bssm kaaa kaab kaak kaam kaar kaas kaba kabb kabr kaka kakk kakm kaks kam- kama kamb kamm kamr kams kara karb kark karm karr kars kas- kasa kasb kask kasm kasr kass kbaa kbab kbak kbam kbar kbas kbba kbbb kbbk kbbm kbbr kbbs kbkb kbkk kbkr kbmb kbmr kbms kbra kbrb kbrk kbsa kbsb kbsk kbsm kbsr kbss kkaa kkam kkar kkba kkbb kkbr kkbs kkkk kkma kkmk kkmr kkms kkrb kkrk kkrr kkrs kksa kksm kksr kkss kmak kmam kmas kmbr kmbs kmkk kmks kmmk kmmm kmmr kmms kmrb kmrr kmrs kmsa kmsb kmsr kmss krab krak kram krar kras krba krbb krbk krbm krbr krka krkk krkr krks krma krmb krmr krms krrb krrk krrm krrr krrs krsa krsk krsr krss ksab ksak ksam ksar ksas ksba ksbr ksbs kska kskb kskk kskr ksks ksma ksmb ksmm ksmr ksms ksra ksrb ksrm ksrr ksrs kssa kssm kssr ksss maaa maak maam maar maas maba mabs maka maks mama mams mar- mara mark marm marr mars masa mask masr mass mbam mbas mbba mbbs mbms mbrs mkak mkks mksm mmaa mmab mmar mmas mmmm mmms mras mrbb mrbm mrbs mrkr mrsa msaa msar msas msba msma msmb msmm msms msra msrb mssa mssm mssr raab raak raam raas raba rabb rabk rabs raka rakk rama ramb ramm rams rara rarb rark rars rasa rask rasm rass rbbb rbbr rbbs rbmk rbms rbss rkss rmas rmbs rras rrkm rrrr rsaa rsma rssa saab saak saam saar saas saba sabb sabr sabs saka sakb sakk saks sam- sama samm sams sara sark sarm sarr sars sasa sask sasm sass sbaa sbar sbas sbbs sbma sbrk sbsa skab skar skra skss smaa smak smas smba smkb smrk smss sram sras ssaa ssab ssam ssas ssbr ssra ssrm ssrs sssa sssb sssm ssss