a-ii aaaa aaab aaac aaai aaar aaba aabb aabc aabi aaca aacb aacc aaci aacr aaib aaic aaii aara aarc aari abaa abab abac abag abai abar abb- abba abbb abbi abbr abca abcb abcc abci abcr abia abib abic abig abir abra abrc abri acaa acab acac acag acai acar acba acca accc acci acga acgi acgr aci- acia acic acir acr- acra acrc acri acrr agac agag agai agar agba agca agcc agga aggi agia agib agic agig agii agir agra agri aiai aiba aica aicc aicr aiga aiia aiib aiic aiir aira airi arab arac arag arai arar arba arbi arc- arca arci arga argb argi aria arib arig arii arr- arra arrc arrg arri arrr ba-i baaa baar baba babb babi babr bac- baca bacc baci baga bagg bagi baia baib baic baig bair bar- bara barb barc barg bari barr bbbb bbci bbga bbrc bbrg bcaa bcar bcbc bcbg bcca bccc bcci bcia bcra bgca bgia biar biba bibb bibi bica bicc bicg bici biga bigb bigc bigg bira birb birg biri birr brab brac brag brai brca brcb bria bric brig brrr caaa caab caac caba cabg cabi cac- caca cacc caci cacr caga cagg cagi cagr caia caib caic cair cara carb carc cari carr cbac cbar cbbc cbca cbcc cbcr cbga cbgb cbia cbir ccaa ccab ccac ccag ccai ccar ccba ccbc ccca cccb cccc ccci ccga ccgc ccic ccii ccir ccra ccrc ccrg ccri cgac cgcc cgcg ciaa ciar ciba cibc cibi cica cicc cici cicr ciga cigi ciia ciii cira cirb circ ciri cirr crab crac crag crai crar crbc crca crcc crcr cria crib cric crig gaar gaba gabb gabi gabr gaga gagg gagi gaia gaig gair gara garb garg gari garr gbag gc-c gcaa gcbc gccc gcic gcii gcrg gggg giaa giac giai giba gibb gica gicr giga gigg gigi gira girg giri girr grab grac grai grbr grcc gria grib gric grig grrr iaaa iaac iaai iaba iaca iacc iacr iaia iara iarc ibac ibar ibca ibga ibia ibra ibrc ibri icaa icab icac icag icai icar icbc icca iccb iccc icci iccr icga icgc icra icrc icrr igac igar igba igbc igcc igga igia igra igri iiac iica iiii iira iirc irac irai irar irca ircc ircg iri- iria iric irig irra irrc irri raab raag raba rabb rabi rac- raca racc raci raga ragg ragi raia raic raig raii rair rara rarb rari rbbb rbbr rcac rcbc rccb rccc rcga rcgc rcic rcrg rgba rgbi riaa riab riai rib- riba rica ricc riga rigg rigi riia riri rrrr