a-ii aaaa aaab aaac aaai aaal aaar aaba aabb aabc aabi aabl aaca aacb aacc aaci aacl aacr aaib aaic aaii aala aalc aali aall aara aarc aari abaa abab abac abai abal abar abb- abba abbb abbi abbr abca abcb abcc abci abcl abcr abia abib abic abil abir abla abra abrc abri acaa acab acac acai acar acba acbl acca accc acci aci- acia acic acir acla aclc acli aclr acr- acra acrc acri acrr aiai aiba aibl aica aicc aicr aiia aiib aiic aiir aila aili aira airi alaa alac alai alal alar alb- alba albc albi alca alcc ali- alia alib alii alil alir all- alla alli alll allr arab arac arai aral arar arba arbi arc- arca arci aria arib arii aril arla arli arr- arra arrc arri arrr ba-i baaa baal baar baba babb babi babr bac- baca bacc baci baia baib baic bail bair bala balc bali ball bar- bara barb barc bari barr bbbb bbci bblb bbrc bcaa bcar bcbc bcca bccc bcci bccl bcia bcra bial biar biba bibb bibi bibl bica bicc bici bila bili bill bira birb biri birl birr blaa blab blac blic blir blrc brab brac brai brca brcb bria bric bril brrr caaa caab caac caal caba cabi cac- caca cacc caci cacr caia caib caic cail cair cala calc cali call cara carb carc cari carl carr cbac cbal cbar cbbc cbca cbcc cbcl cbcr cbia cbir cblb cblc cbrl ccaa ccab ccac ccai ccar ccba ccbc ccca cccb cccc ccci cccl ccic ccii ccil ccir ccla cclc ccli ccra ccrc ccri ccrl ciaa cial ciar ciba cibc cibi cica cicc cici cicr ciia ciii cila cili cill cira cirb circ ciri cirl cirr clab clai clar clib clic clii clir clra clri crab crac crai crar crbc crca crcc crcr cria crib cric iaaa iaac iaai iaal iaba iaca iacc iacr iaia iala iall iara iarc ibac ibar ibca ibia ibra ibrc ibri icaa icab icac icai ical icar icbc icca iccb iccc icci iccl iccr icll iclr icra icrc icrr iiac iica iiii iila iira iirc ilac ilal ilar ilbc ilca ilia ilic ilir ill- illa illi irac 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 laia laic lail lair lala lali lall lara larb larc lari larr lbar lbcc lbia lblr lcac lcbc lcca lccc lcia lcra lcrl liac liar liba libc libr lica licr liia liii liir lila lilb lili lill lira lirc liri lirl lirr llcc lllc llll lrac lral lrba lric lrrc lrrr raab raba rabb rabi rabl rac- raca racc raci raia raic raii rail rair rala ralb rall rara rarb rari rbbb rbbr rbcl rcac rcbc rccb rccc rcic riaa riab riai rial rib- riba rica ricc riia rila rill riri rlab rrrr