a-ak a-ii aaaa aaab aaac aaaf aaai aaar aaba aabb aabc aabi aaca aacb aacc aacf aaci aack aacr aafa aafb aafc aaff aafi aaib aaic aaii aaka aara aarc aari abaa abab abac abaf abai abak abar abb- abba abbb abbi abbr abca abcb abcc abcf abci abcr abff abia abib abic abir abra abrc abri acaa acab acac acai acar acba acca accc accf acci acfc acfi aci- acia acic acif acir acr- acra acrc acri acrr afaa afak afar afca afcb afcc afci affa affc affi afia afib afif afik afir afka afkr afr- afra afrc afri aiai aiba aica aicc aicf aicr aiff aiia aiib aiic aiir aika aiki aira airi akaa akai akar akca akia akif akik akir akka akki akr- akra arab arac araf arai arak arar arba arbi arc- arca arci arfa arfb arfc arff aria arib arif arii arik arka arki arr- arra arrc arri arrk arrr ba-i baaa baaf baak baar baba babb babi babr bac- baca bacc baci back bafc baff baia baib baic baik bair bak- baka baki bakr bar- bara barb barc barf bari bark barr bbbb bbci bbfc bbrc bcaa bcar bcbc bcca bccc bcci bcfc bcia bcra bfca biaf biak biar biba bibb bibi bica bicc bici bick bifa biff bifi bira birb biri birk birr brab brac braf brai brak brca brcb brfc bria bric brik brka brkb brrr caaa caab caac caaf caba cabf cabi cac- caca cacc caci cack cacr cafa cafb cafc caff caia caib caic caik cair caka cara carb carc carf cari cark carr cbac cbar cbbc cbca cbcc cbcr cbfb cbfc cbia cbir cbka cbkr ccaa ccab ccac ccaf ccai ccar ccba ccbc ccca cccb cccc cccf ccci ccfa ccfc ccff ccfi ccic ccii ccir ccra ccrc ccrf ccri cfaa cfab cfac cfar cfbc cfbr cfca cfcb cfcf cffb cffr cfia cfra cfrb ciaa ciak ciar ciba cibc cibi cica cicc cici cicr cifa ciff ciia ciii cika cikr cira cirb circ ciri cirk cirr ckac ckbc ckbi ckck ckfi ckfr ckrc crab crac craf crai crar crbc crca crcc crcr crfc cria crib cric crif crik crkc f--k faaa faac faba fabi faca facc fack fafa fafc faff fafi faik fair faki fara farb farc fark farr fbar fcab fcar fcba fcca fccf fcic fcii fcra ffar ffcc ffff ffii ffrr fiaa fiac fiaf fiar fiba fica ficc fick fifa fifc fiff fifi fiii fika fiki fira firk fkab frab frac frak frbc frcc frfc fria frib fric frik iaaa iaac iaai iaba iaca iacc iacr iafc iaff iaia iara iarc ibac ibar ibca ibfi ibia ibra ibrc ibri icaa icab icac icaf icai icar icbc icca iccb iccc iccf icci iccr icfb icra icrc icrf icrr ifaa ifac ifar ifbb ific ifra ifrb ifrf ifri iiac iica iifa iiii iira iirc ikar ikki ikra ikri irac iraf irai irak irar irca ircc iri- iria iric irka irki irra irrc irri k-ci kaaa kaab kaaf kaai kaak kaar kaba kabb kabc kabf kabi kabr kacb kacc kaci kafa kafc kaff kafi kafr kaia kaib kaic kaif kaii kaik kair kaka kakc kaki kakk kara karb karf kari kark karr kbaa kbab kbac kbai kbak kbar kbba kbbb kbbc kbbf kbbi kbbk kbbr kbca kbcb kbci kbck kbcr kbfb kbfc kbff kbfi kbfk kbfr kbia kbib kbic kbif kbik kbkb kbkf kbkk kbkr kbra kbrb kbrc kbrf kbri kbrk kcaa kcab kcac kcai kcar kcba kcbc kcbf kcbi kcbk kcbr kcca kccb kccc kcci kcck kccr kcfa kcfb kcfc kcfi kcic kcif kcii kcir kckc kckf kckk kckr kcrc kcri kcrr kfab kfac kfai kfar kfbc kfbk kfcf kfcr kffa kffb kfff kffk kfia kfir kfka kfkb kfra kfrc kfri kfrr kiab kiac kiai kiar kiba kibb kibc kibi kibr kica kicb kicc kick kicr kifa kiff kifr kiia kiic kiii kiik kika kikc kikf kiki kikk kikr kira kirb kirc kirf kiri kirk kirr kkaa kkac kkai kkar kkba kkbb kkbi kkbr kkcb kkci kkck kkcr kkfi kkfr kkia kkic kkik kkkk kkrb kkrc kkrf kkrk kkrr krab krac krai krak krar krba krbb krbi krbk krbr krca krcb krcc krci krfc krff kria krib krik krka krkc krki krkk krkr krrb krrc krrf krri krrk krrr raab raaf raak raba rabb rabi rabk rac- raca racc raci rack rafa rafc raff rafi raia raic raif raii raik rair raka raki rakk rara rarb rarf rari rark rbaf rbbb rbbr rcac rcaf rcbc rccb rccc rcfc rcic rffc rfic riaa riab riai riak rib- riba rica ricc rick rifa riff riia riif rika riki rikk riri rkkf rrfc rrif rrrr