a-fu a-ii aaaa aaab aaac aaaf aaai aaar aaba aabb aabc aabi aaca aacb aacc aacf aaci aacr aacu aafa aafb aafc aaff aafi aaib aaic aaii aara aarc aari aaru abaa abab abac abaf abai abar abau abb- abba abbb abbi abbr abca abcb abcc abcf abci abcr abff abia abib abic abir abiu abra abrc abri abua abuf acaa acab acac acai acar acba acca accc accf acci accu acfc acfi aci- acia acic acif acir acr- acra acrc acri acrr acu- acuf acur afaa afar afca afcb afcc afci afcu affa affc affi afia afib afif afir afr- afra afrc afri afru afua aiai aiba aica aicc aicf aicr aiff aiia aiib aiic aiir aira airi aiui arab arac araf arai arar arau arba arbi arc- arca arci arfa arfb arfc arff arfu aria arib arif arii arr- arra arrc arri arrr arru arua arub arui auaa auca auci aufc aufi aur- aura auri ba-i baaa baaf baar baba babb babi babr babu bac- baca bacc baci bafc baff baia baib baic bair bar- bara barb barc barf bari barr baru bau- bauf baur bbau bbbb bbci bbfc bbrc bcaa bcar bcbc bcca bccc bcci bcfc bcia bcra bcru bcuc bfca biaf biar biba bibb bibi bica bicc bici bifa biff bifi bira birb biri birr biru brab brac braf brai brau brca brcb brfc brfu bria bric brrr bruc buar buba bubb bubi bubu buca bucc buci bucu bufc buff bufr buic buif buir buiu bur- bura burb buri burr buru caaa caab caac caaf caba cabf cabi cabu cac- caca cacc caci cacr cafa cafb cafc caff cafu caia caib caic cair caiu cara carb carc carf cari carr cauc cauf cbac cbar cbbc cbca cbcc cbcr cbcu cbfb cbfc cbia cbir ccaa ccab ccac ccaf ccai ccar ccba ccbc ccca cccb cccc cccf ccci cccu ccfa ccfc ccff ccfi ccic ccii ccir ccra ccrc ccrf ccri ccuc cfaa cfab cfac cfar cfbc cfbr cfca cfcb cfcf cffb cffr cfia cfra cfrb ciaa ciar ciau ciba cibc cibi cica cicc cici cicr cicu cifa ciff ciia ciii cira cirb circ ciri cirr ciuc crab crac craf crai crar crau crbc crbu crca crcc crcr crfc cria crib cric crif criu crub cuau cub- cuba cubb cubi cuca cucc cuci cufa cufc cuff cufi cui- cuif cuir cura curb curf curi curr faaa faac faba fabi fabu faca facc fafa fafc faff fafi fair fara farb farc farr faru faur fbar fcab fcar fcba fcca fccf fcic fcii fcra ffar ffcc ffff ffii ffrr fiaa fiac fiaf fiar fiba fica ficc fifa fifc fiff fifi fiii fira fiua frab frac frau frbc frcc frfc fria frib fric frub fuar fubb fubu fuc- fuca fuci fufc fuff fufu fuir fur- fura furi furr iaaa iaac iaai iaba iaca iacc iacr iacu iafc iaff iaia iara iarc iaru ibac ibar ibca ibfi ibia ibra ibrc ibri icaa icab icac icaf icai icar icbc icca iccb iccc iccf icci iccr iccu icfb icra icrc icrf icrr icru icub ifaa ifac ifar ifbb ific ifra ifrb ifrf ifri iiac iica iifa iiii iira iirc iiuc irac iraf irai irar irca ircc ircu irfu iri- iria iric irra irrc irri iucc iuiu iura raab raaf raba rabb rabi rabu rac- raca racc raci racu rafa rafc raff rafi raia raic raif raii rair raiu rara rarb rarf rari raua raub rauc rauf rbaf rbbb rbbr rcac rcaf rcbc rccb rccc rcfc rcic rffc rfic riaa riab riai riau rib- riba ribu rica ricc rifa riff rifu riia riif riri rrfc rrif rrrr ruba rubb rubi rubu ruca ruci rufa rufc ruff ruif rura rurc ruri ruru uabc uaca uafa uair uarc uaru uaua ubac ubar ubba ubbi ubic ubii ubir ubra ucai ucar ucbc ucca ucci ucfa ucfb ucrc ucua ufcu uffa ufra uica uira uirr urac urai urau urba urbi urca urci urfa urff urfi uria urib uric urif uriu urra urri urur uuri uuuu