a-ak a-ii aaaa aaab aaac aaai aaar aaba aabb aabc aabi aaca aacb aacc aaci aack aacr aaib aaic aaii aaka aara aarc aari abaa abab abac abai abak abar abb- abba abbb abbi abbr abca abcb abcc abci abcr abia abib abic abir abra abrc abri acaa acab acac acai acar acba acca accc acci aci- acia acic acir acr- acra acrc acri acrr aiai aiba aica aicc aicr aiia aiib aiic aiir aika aiki aira airi akaa akai akar akca akia akik akir akka akki akr- akra arab arac arai arak arar arba arbi arc- arca arci aria arib arii arik arka arki arr- arra arrc arri arrk arrr ba-i baaa baak baar baba babb babi babr bac- baca bacc baci back baia baib baic baik bair bak- baka baki bakr bar- bara barb barc bari bark barr bbbb bbci bbrc bcaa bcar bcbc bcca bccc bcci bcia bcra biak biar biba bibb bibi bica bicc bici bick bira birb biri birk birr brab brac brai brak brca brcb bria bric brik brka brkb brrr caaa caab caac caba cabi cac- caca cacc caci cack cacr caia caib caic caik cair caka cara carb carc cari cark carr cbac cbar cbbc cbca cbcc cbcr cbia cbir cbka cbkr ccaa ccab ccac ccai ccar ccba ccbc ccca cccb cccc ccci ccic ccii ccir ccra ccrc ccri ciaa ciak ciar ciba cibc cibi cica cicc cici cicr ciia ciii cika cikr cira cirb circ ciri cirk cirr ckac ckbc ckbi ckck ckrc crab crac crai crar crbc crca crcc crcr cria crib cric crik crkc iaaa iaac iaai iaba iaca iacc iacr iaia iara iarc ibac ibar ibca ibia ibra ibrc ibri icaa icab icac icai icar icbc icca iccb iccc icci iccr icra icrc icrr iiac iica iiii iira iirc ikar ikki ikra ikri irac irai irak irar irca ircc iri- iria iric irka irki irra irrc irri k-ci kaaa kaab kaai kaak kaar kaba kabb kabc kabi kabr kacb kacc kaci kaia kaib kaic kaii kaik kair kaka kakc kaki kakk kara karb kari kark karr kbaa kbab kbac kbai kbak kbar kbba kbbb kbbc kbbi kbbk kbbr kbca kbcb kbci kbck kbcr kbia kbib kbic kbik kbkb kbkk kbkr kbra kbrb kbrc kbri kbrk kcaa kcab kcac kcai kcar kcba kcbc kcbi kcbk kcbr kcca kccb kccc kcci kcck kccr kcic kcii kcir kckc kckk kckr kcrc kcri kcrr kiab kiac kiai kiar kiba kibb kibc kibi kibr kica kicb kicc kick kicr kiia kiic kiii kiik kika kikc kiki kikk kikr kira kirb kirc kiri kirk kirr kkaa kkac kkai kkar kkba kkbb kkbi kkbr kkcb kkci kkck kkcr kkia kkic kkik kkkk kkrb kkrc kkrk kkrr krab krac krai krak krar krba krbb krbi krbk krbr krca krcb krcc krci kria krib krik krka krkc krki krkk krkr krrb krrc krri krrk krrr raab raak raba rabb rabi rabk rac- raca racc raci rack raia raic raii raik rair raka raki rakk rara rarb rari rark rbbb rbbr rcac rcbc rccb rccc rcic riaa riab riai riak rib- riba rica ricc rick riia rika riki rikk riri rrrr