a-ii aaaa aaab aaac aaai aaar aaba aabb aabc aabi aaca aacb aacc aaci aaco aacr aaib aaic aaii aaoo aara aarc aari aaro abaa abab abac abai abar abb- abba abbb abbi abbo abbr abca abcb abcc abci abcr abia abib abic abir aboa abob aboo abor abra abrc abri abro acaa acab acac acai acar acba acca accc acci acco aci- acia acic acir acoa acor acr- acra acrc acri acro acrr aiai aiba aibo aica aicc aicr aiia aiib aiic aiir aioc aioi aira airi airo aoba aoca aora aorb arab arac arai arar arba arbi arc- arca arci arco aria arib arii ario aroa arob aroi aroo aror arr- arra arrc arri arro arrr ba-i baaa baar baba babb babi babo babr bac- baca bacc baci baco baia baib baic baio bair bar- bara barb barc bari baro barr bbbb bbci bbrc bcaa bcar bcbc bcca bccc bcci bcia bcor bcra biao biar biba bibb bibi bibo bica bicc bici bico bio- bioc bioi bira birb biri biro birr boab boac boai boar boba bobb bobi bobo boca boco boi- boii boob booc boor bor- bora bori boro borr brab brac brai brao brca brcb bria bric brio broa brob broc broo bror brrr c-bo caaa caab caac caba cabi cabo cac- caca cacc caci caco cacr caia caib caic caio cair caoi caor cara carb carc cari caro carr cbac cbar cbbc cbca cbcc cbcr cbia cbir ccaa ccab ccac ccai ccar ccba ccbc ccca cccb cccc ccci ccic ccii ccir ccob ccoc ccra ccrc ccri ciaa ciao ciar ciba cibc cibi cibo cica cicc cici cico cicr ciia ciii ciob cior cira cirb circ ciri ciro cirr coai coba cobb cobi cobo coca coco coia coir coob cor- cora corb corc cori coro corr crab crac crai crar crbc crca crcc crcr cria crib cric crob croc croo cror iaaa iaac iaai iaba iaca iacc iacr iaia iara iarc ibac ibar ibca ibia ibra ibrc ibri ibro icaa icab icac icai icao icar icbc icca iccb iccc icci icco iccr icoc icor icra icrc icrr iiac iica iiii iiio iioi iioo iira iirc ioba iobi ioci ioii ioio iooi iooo iora iori irac irai irao irar irca ircc iri- iria iric irio irob iroc irra irrc irri oaic oara obai obba obbo obia oboi obor obra obri obro ocab ocac ocbc occa occc occi ocra ocro ocrr oiba oici oiii oira ooaa ooba oobi oocr ooia oooo oora orab orac orai orao orar orba orbb orbi orbo orca orci orco ori- oria oric orio oro- oror orra orri orro raab raba rabb rabi rabo rac- raca racc raci raco raia raic raii rair raob raoc rara rarb rari raro rbbb rbbr rcac rcbc rcbo rccb rccc rcic riaa riab riai rib- riba ribo rica ricc rico riia riri roab roar rob- roba robb robi robo roca rocc roco roia roio roir roob rooi roor rora rorc rori roro rrrr