a-ii aaaa aaab aaac aaaf aaai aaal aaar aaba aabb aabc aabi aabl aaca aacb aacc aacf aaci aacl aacr aafa aafb aafc aaff aafi aafl aaib aaic aaii aala aalc aali aall aara aarc aari abaa abab abac abaf abai abal abar abb- abba abbb abbi abbr abca abcb abcc abcf abci abcl abcr abff abia abib abic abil abir abla abra abrc abri acaa acab acac acai acar acba acbl acca accc accf acci acfc acfi acfl aci- acia acic acif acir acla aclc acli aclr acr- acra acrc acri acrr afaa afar afca afcb afcc afci affa affc affi afia afib afif afil afir afla aflc afr- afra afrc afri aiai aiba aibl aica aicc aicf aicr aiff aifl aiia aiib aiic aiir aila aili aira airi alaa alac alai alal alar alb- alba albc albi alca alcc alfa alfi ali- alia alib alif alii alil alir all- alla alli alll allr arab arac araf arai aral arar arba arbi arc- arca arci arfa arfb arfc arff aria arib arif arii aril arla arli arr- arra arrc arri arrr ba-i baaa baaf baal baar baba babb babi babr bac- baca bacc baci bafc baff baia baib baic bail bair bala balc balf bali ball bar- bara barb barc barf bari barr bbbb bbci bbfc bblb bbrc bcaa bcar bcbc bcca bccc bcci bccl bcfc bcia bcra bfca bffl biaf bial biar biba bibb bibi bibl bica bicc bici bifa biff bifi bila bili bill bira birb biri birl birr blaa blab blac blfc blic blir blrc brab brac braf brai brca brcb brfc bria bric bril brrr caaa caab caac caaf caal caba cabf cabi cac- caca cacc caci cacr cafa cafb cafc caff cafl caia caib caic cail cair cala calc calf cali call cara carb carc carf cari carl carr cbac cbal cbar cbbc cbca cbcc cbcl cbcr cbfb cbfc cbia cbir cblb cblc cbrl ccaa ccab ccac ccaf ccai ccar ccba ccbc ccca cccb cccc cccf ccci cccl ccfa ccfc ccff ccfi ccfl ccic ccii ccil ccir ccla cclc ccli ccra ccrc ccrf ccri ccrl cfaa cfab cfac cfar cfbc cfbr cfca cfcb cfcf cfcl cffb cffr cfia cfra cfrb ciaa cial ciar ciba cibc cibi cica cicc cici cicr cifa ciff cifl ciia ciii cila cili cill cira cirb circ ciri cirl cirr clab claf clai clar clib clic clif clii clir clra clri crab crac craf crai crar crbc crca crcc crcr crfc crfl cria crib cric crif crlf faaa faac faba fabi faca facc fafa fafc faff fafi fail fair fala falc fali fall fara farb farc farl farr fbar fbla fcab fcal fcar fcba fcca fccf fcic fcii fcra ffar ffcc ffff ffii ffrr fiaa fiac fiaf fial fiar fiba fica ficc fifa fifc fiff fifi fiii fiil fila fili fill fira flab flac flcl flia flic flii frab frac frbc frcc frfc fria frib fric fril frla iaaa iaac iaai iaal iaba iaca iacc iacr iafc iaff iafl iaia iala iall iara iarc ibac ibar ibca ibfi ibia ibra ibrc ibri icaa icab icac icaf icai ical icar icbc icca iccb iccc iccf icci iccl iccr icfb icll iclr icra icrc icrf icrr ifaa ifac ifar ifbb ific ifil ifla ifra ifrb ifrf ifri iiac iica iifa iiii iila iira iirc ilac ilal ilar ilbc ilca ilia ilic ilir ill- illa illi irac iraf irai iral irar irca ircc iri- iria iric iril irla irlb irra irrc irri laaa laac laal laar laba labi labr laca lacc laci lacl lafb lafc laff laia laic lail lair lala lali lall lara larb larc larf lari larr lbar lbcc lbia lblr lcac lcbc lcca lccc lcfc lcfr lcia lcra lcrl lfca lfcc liac liar liba libc libr lica licr lifa liff lifl liia liii liir lila lilb lili lill lira lirc liri lirl lirr llcc lllc llll lrac lral lrba lrfc lric lrif lrrc lrrr raab raaf raba rabb rabi rabl rac- raca racc raci rafa rafc raff rafi raia raic raif raii rail rair rala ralb ralf rall rara rarb rarf rari rbaf rbbb rbbr rbcl rcac rcaf rcbc rccb rccc rcfc rcic rffc rffl rfic riaa riab riai rial rib- riba rica ricc rifa riff riia riif rila rill riri rlab rlif rrfc rrif rrrr