a-ii aaaa aaab aaac aaaf aaai aaar aaba aabb aabc aabi aaca aacb aacc aacf aaci aaco aacr aafa aafb aafc aaff aafi aaib aaic aaii aaoo aara aarc aari aaro abaa abab abac abaf abai abar abb- abba abbb abbi abbo abbr abca abcb abcc abcf abci abcr abff abia abib abic abir aboa abob abof aboo abor abra abrc abri abro acaa acab acac acai acar acba acca accc accf acci acco acfc acfi aci- acia acic acif acir acoa acor acr- acra acrc acri acro acrr afaa afao afar afca afcb afcc afci affa affc affi affo afia afib afif afir afoa afoo afor afr- afra afrc afri afro aiai aiba aibo aica aicc aicf aicr aiff aiia aiib aiic aiir aioc aioi aira airi airo aoba aoca aora aorb arab arac araf arai arar arba arbi arc- arca arci arco arfa arfb arfc arff aria arib arif arii ario aroa arob aroi aroo aror arr- arra arrc arri arro arrr ba-i baaa baaf baar baba babb babi babo babr bac- baca bacc baci baco bafc baff bafo baia baib baic baio bair bar- bara barb barc barf bari baro barr bbbb bbci bbfc bbrc bcaa bcar bcbc bcca bccc bcci bcfc bcia bcof bcor bcra bfca biaf biao biar biba bibb bibi bibo bica bicc bici bico bifa biff bifi bio- bioc bioi bira birb biri biro birr boab boac boai boar boba bobb bobi bobo boca boco bofa boff boi- boii boob booc boof boor bor- bora borf bori boro borr brab brac braf brai brao brca brcb brfc bria bric brio broa brob broc broo bror brrr c-bo caaa caab caac caaf caba cabf cabi cabo cac- caca cacc caci caco cacr cafa cafb cafc caff caia caib caic caio cair caoi caor cara carb carc carf cari caro carr cbac cbar cbbc cbca cbcc cbcr cbfb cbfc cbia cbir ccaa ccab ccac ccaf ccai ccar ccba ccbc ccca cccb cccc cccf ccci ccfa ccfc ccff ccfi ccic ccii ccir ccob ccoc ccra ccrc ccrf ccri cfaa cfab cfac cfao cfar cfbc cfbr cfca cfcb cfcf cfco cffb cffr cfia cfoa cfor cfra cfrb ciaa ciao ciar ciba cibc cibi cibo cica cicc cici cico cicr cifa ciff ciia ciii ciob cior cira cirb circ ciri ciro cirr coai coba cobb cobi cobo coca coco cofc coff cofi coia coif coir coob coof cor- cora corb corc corf cori coro corr crab crac craf crai crar crbc crca crcc crcr crfc cria crib cric crif crob croc croo cror faaa faac faba fabi fabo faca facc fafa fafc faff fafi fafo faio fair fara farb farc faro farr fbar fcab fcar fcba fcca fccf fcic fcii fcra ffar ffcc ffff ffii ffrr fiaa fiac fiaf fiar fiba fica ficc fico fifa fifc fiff fifi fifo fiii fior fira foaf foar foba foca foci foco fofo foia foof for- fora forb fori foro forr frab frac frbc frcc frfc fria frib fric frio frob iaaa iaac iaai iaba iaca iacc iacr iafc iaff iaia iara iarc ibac ibar ibca ibfi ibia ibra ibrc ibri ibro icaa icab icac icaf icai icao icar icbc icca iccb iccc iccf icci icco iccr icfb icoc icor icra icrc icrf icrr ifaa ifac ifao ifar ifbb ifco ific ifor ifra ifrb ifrf ifri iiac iica iifa iiii iiio iioi iioo iira iirc ioba iobi ioci iofc ioii ioio ioof iooi iooo iora iori irac iraf irai irao irar irca ircc iri- iria iric irio irob iroc irra irrc irri oafc oafo oaic oara obai obba obbo obia oboi obor obra obri obro ocab ocac ocbc occa occc occi ocfa ocra ocro ocrr ofcr off- offa offc offo offr ofor ofra oiba oici oiii oira ooaa ooba oobi oocr ooff ooia oooo oora orab orac orai orao orar orba orbb orbi orbo orca orci orco orff orfi ori- oria oric orif orio oro- orof oror orra orri orro raab raaf raba rabb rabi rabo rac- raca racc raci raco rafa rafc raff rafi raia raic raif raii rair raob raoc rara rarb rarf rari raro rbaf rbbb rbbr rcac rcaf rcbc rcbo rccb rccc rcfc rcic rffc rfic riaa riab riai rib- riba ribo rica ricc rico rifa riff riia riif riri roab roaf roar rob- roba robb robi robo roca rocc roco rofc roff rofo roia roif roio roir roob roof rooi roor rora rorc rori roro rrfc rrif rrrr