a-ii aaaa aaab aaac aaaf aaai aaap aaar aaba aabb aabc aabi aabp aaca aacb aacc aacf aaci aacp aacr aafa aafb aafc aaff aafi aaib aaic aaii aapa aapc aapi aara aarc aari aarp abaa abab abac abaf abai abap abar abb- abba abbb abbi abbr abca abcb abcc abcf abci abcp abcr abff abia abib abic abir abpa abpc abpi abpp abpr abra abrc abri acaa acab acac acai acap acar acba acca accc accf acci accp acfc acfi aci- acia acic acif acip acir acpa acpi acpr acr- acra acrc acri acrr afaa afap afar afca afcb afcc afci affa affc affi afia afib afif afir afpa afpc afr- afra afrc afri aiai aiba aica aicc aicf aicp aicr aiff aiia aiib aiic aiir aipa aipf aipi aira airi airp apac apai apap apar apba apbr apca apcb apcc apcr apfa apfc api- apia apic apip appa appc appr apra aprc apri arab arac araf arai arap arar arba arbi arc- arca arci arfa arfb arfc arff aria arib arif arii arip arpa arpi arr- arra arrc arri arrr ba-i baaa baaf baar baba babb babi babr bac- baca bacc baci bafc baff baia baib baic bair bapa bapc bapi bapp bar- bara barb barc barf bari barr bbbb bbci bbfc bbpr bbrc bcaa bcap bcar bcbc bcbp bcca bccc bcci bcfc bcia bcpp bcra bfca bfpp biaf biap biar biba bibb bibi bica bicc bici bifa biff bifi bipa bipp bira birb biri birr bpai bpcp bpfc bprc brab brac braf brai brca brcb brfc bria bric brrr caaa caab caac caaf caap caba cabf cabi cac- caca cacc caci cacr cafa cafb cafc caff caia caib caic caip cair capa capb capc capi capp cara carb carc carf cari carp carr cbac cbar cbbc cbca cbcc cbcp cbcr cbfb cbfc cbia cbir cbpc cbpp ccaa ccab ccac ccaf ccai ccap ccar ccba ccbc ccca cccb cccc cccf ccci cccp ccfa ccfc ccff ccfi ccic ccii ccip ccir ccpa ccpp ccpr ccra ccrc ccrf ccri ccrp cfaa cfab cfac cfar cfbc cfbr cfca cfcb cfcf cffb cffr cfia cfpa cfpr cfra cfrb cfrp ciaa ciar ciba cibc cibi cica cicc cici cicr cifa ciff ciia ciii cipa cipf cipp cira cirb circ ciri cirr cpaa cpac cpaf cpap cpbc cpca cpff cpia cpic cpif cppa cpri crab crac craf crai crap crar crbc crca crcc crcr crfc cria crib cric crif crip crpc faaa faac faap faba fabi faca facc facp fafa fafc faff fafi fair fapa fapp fara farb farc farp farr fbar fcab fcap fcar fcba fcca fccf fccp fcic fcii fcpa fcra ffar ffcc ffff ffii ffrr fiaa fiac fiaf fiap fiar fiba fibp fica ficc fifa fifc fiff fifi fiii fipa fipp fira fp-c fpaa fpcc fpra fprf frab frac frap frbc frcc frcp frfc fria frib fric frip iaaa iaac iaai iaap iaba iaca iacc iacp iacr iafc iaff iafp iaia iapa iapf iapp iara iarc ibac ibar ibca ibfi ibia ibra ibrc ibri icaa icab icac icaf icai icap icar icbc icbp icca iccb iccc iccf icci iccp iccr icfb icpa icpc icra icrc icrf icrr ifaa ifac ifar ifbb ifcp ific ifpa ifra ifrb ifrf ifri iiac iica iifa iiii iipa iipf iira iirc ipac ipaf ipba ipca ipcc ipfc ippa ippc ippf ippr ipri irac iraf irai irap irar irbp irca ircc iri- iria iric irip irpa irpc irra irrc irri paap paar paba paca paci pafa pafc paff paia paib paip pair papa papb papi papp papr par- para parc parf pari parp parr pbac pbar pbcc pbpa pbrf pcaa pcaf pcap pcba pcbc pcca pccc pcfc pcia pcip pcpb pcpp pcra pcrc pcrf pfaa pfcb pfff pffr pfic pfra piaf piai pibb pibi pica picc pici picr pifa piff piia piip pipa pipi pipp pira pirc piri pirr ppac ppap ppar ppcc ppci ppfa ppib ppic ppif pppa pppp pprc pprf prai prar prbc prca prcc prcf prcp prfc pri- pria prif prii prri raab raaf raba rabb rabi rac- raca racc raci rafa rafc raff rafi raia raic raif raii raip rair rapa rapc rapi rapp rara rarb rarf rari rbaf rbbb rbbr rcac rcaf rcbc rccb rccc rcfc rcic rcpi rffc rfic riaa riab riai rib- riba rica ricc rifa riff riia riif ripa ripi ripp ripr riri rpca rpfc rpii rrfc rrif rrrr