a-ii aaaa aaab aaac aaai aaal aaar aaba aabb aabc aabi aabl aabt aaca aacb aacc aaci aacl aacr aact aaib aaic aaii aala aalc aali aall aara aarc aari aart aata aatc aatt abaa abab abac abai abal abar abat abb- abba abbb abbi abbr abbt abca abcb abcc abci abcl abcr abct abia abib abic abil abir abit abla abra abrc abri abta ac-t acaa acab acac acai acar acat acba acbl acca accc acci acct aci- acia acic acir acla aclc acli aclr acr- acra acrc acri acrr acta actc acti actl actt aiai aiba aibl aica aicc aicr aiia aiib aiic aiir aila aili aira airi airt aita aiti aitr aitt alaa alac alai alal alar alat alb- alba albc albi alca alcc ali- alia alib alii alil alir alit all- alla alli alll allr alta alti arab arac arai aral arar arat arba arbi arc- arca arci arct aria arib arii aril arit arla arli arr- arra arrc arri arrr arrt arta artc arti artr at-l at-t ataa atab atac atai atal atar atat atca atcc atcl atcr atia atic atil atit atla atli atra atrc atri atta atti attr ba-i baaa baal baar baat baba babb babi babr bac- baca bacc baci bact baia baib baic bail bair bait bala balc bali ball balt bar- bara barb barc bari barr bart bata batc bati batt bbbb bbci bblb bbrc bcaa bcar bcat bcbc bcca bccc bcci bccl bcia bcit bcra bctc bial biar biat biba bibb bibi bibl bica bicc bici bila bili bill bilt bira birb biri birl birr birt bita bitc bitt blaa blab blac blat blbt blic blir blit blrc brab brac brai brat brca brcb bria bric bril brit brrr brtc btaa btcc btcl btla btrc btrt bttb caaa caab caac caal caat caba cabi cac- caca cacc caci cacr caia caib caic cail cair cait cala calc cali call calt cara carb carc cari carl carr cart cat- cata catb catc cati catt cbac cbal cbar cbat cbbc cbca cbcc cbcl cbcr cbct cbia cbir cbit cblb cblc cbrl cbrt cbta cbtc cbtl ccaa ccab ccac ccai ccar ccat ccba ccbc ccca cccb cccc ccci cccl ccic ccii ccil ccir ccla cclc ccli ccra ccrc ccri ccrl ccrt cctb cctc cctl cctt ciaa cial ciar ciat ciba cibc cibi cica cicc cici cicr cict ciia ciii ciit cila cili cill cilt cira cirb circ ciri cirl cirr cirt cita citb citi citl citt clab clai clar clat clib clic clii clir clit clra clri cltb cltc crab crac crai crar crat crbc crca crcc crcr cria crib cric crit crrt crtc crtl ctab ctal ctba ctbi ctca ctia ctic ctrc ctrl ctta iaaa iaac iaai iaal iaat iaba iaca iacc iacr iact iaia iala iall iara iarc iart iata iatc iati ibac ibar ibat ibca ibia ibra ibrc ibri ibtb ibtc ibtl icaa icab icac icai ical icar icat icbc icca iccb iccc icci iccl iccr icct icll iclr icra icrc icrr icrt icta iiac iica iiii iiit iila iira iirc iita iitr iitt ilac ilal ilar ilbc ilca ilia ilic ilir ilit ill- illa illi illt irac irai iral irar irca ircc iri- iria iric iril irla irlb irra irrc irri irta irti itaa itac itai ital itar itat itia itic itil itll itra itri itta laaa laac laal laar laat laba labi labr laca lacc laci lacl lact laia laic lail lair lait lala lali lall lara larb larc lari larr lart lata latc lati latt lbar lbcc lbia lblr lbrt lcac lcat lcbc lcca lccc lcia lcra lcrl lctl liac liar liat liba libc libr lica licr lict liia liii liir lila lilb lili lill lilt lira lirc liri lirl lirr lirt lita litb liti litl litr litt llat llcc lllc llll lrac lral lrat lrba lric lrrc lrrr lrta ltac ltbl ltcc ltci ltib ltra lttc lttr raab raat raba rabb rabi rabl rac- raca racc raci ract raia raic raii rail rair rait rala ralb rall ralt rara rarb rari rata rati ratt rbbb rbbr rbcl rcac rcbc rccb rccc rcic rctc rcti riaa riab riai rial riat rib- riba rica ricc rict riia rila rill riri rita riti ritl ritt rlab rrat rrrr rtai rtca rtcc rtlt taa- taal taar taat taba tabb tabc tabi tabl taca tacc taci tacl tact taia tail tair tait tala talc tali tall tara tarb tarc tari tarr tart tata tatb tati tatr tatt tbar tbca tbcb tbcc tbil tbit tbrb tbta tcca tccc tctc tiaa tiab tial tiar tiba tibi tica ticc tiit tila till tilr tilt tira tirb tiri tirl tirr tita titc titi titt tlac tlli traa trab trac trai tral trat trca trcc trcl tri- tria trib tric tril trit trra trtc trtr ttab ttbb tttt