-ic a-a a-b a-c a-i aaa aab aac aai aap aar aas ab- aba abb abc abi abp abr abs ac- aca acb acc aci acp acr acs ai- aia aib aic aii aip air ais ap- apa apb apc api app apr aps ar- ara arb arc ari arp arr ars as- asa asb asc asi asp asr ass b-p baa bab bac bai bap bar bas bba bbb bbc bbi bbp bbr bbs bca bcb bcc bci bcp bcr bcs bi- bia bib bic bii bip bir bis bpa bpb bpc bpi bpp bpr bps bra brb bri brp brr brs bsa bsb bsc bsi bsp bsr bss c-- caa cab cac cai cap car cas cba cbb cbc cbi cbp cbr cbs cca ccb ccc cci ccp ccr ccs ci- cia cib cic cii cip cir cis cpa cpb cpc cpi cpp cpr cps cra crb crc cri crp crr crs csa csb csc csi csp csr css ia- iaa iab iac iai iap iar ias iba ibb ibc ibi ibp ibr ibs ica icb icc ici icp icr ics iia iib iic iii iip iir iis ipa ipb ipc ipi ipp ipr ips ir- ira irb irc iri irp irr irs is- isa isb isc isi isp isr iss p-p paa pab pac pai pap par pas pba pbb pbc pbi pbp pbr pbs pca pcb pcc pci pcp pcr pcs pia pib pic pii pip pir pis ppa ppb ppc ppi ppp ppr pps pra prb prc pri prp prr prs ps- psa psb psc psi psp psr pss ra- raa rab rac rai rap rar ras rba rbb rbc rbi rbp rbr rbs rca rcb rcc rci rcp rcr rcs ria rib ric rii rip rir ris rpa rpb rpc rpi rpp rpr rps rra rrb rrc rri rrp rrr rrs rsa rsb rsc rsi rsp rsr rss saa sab sac sai sap sar sas sba sbb sbc sbi sbp sbr sbs sca scb scc sci scp scr scs sia sib sic sii sip sir sis spa spb spc spi spp spr sps sr- sra srb src sri srp srr srs ss- ssa ssb ssc ssi ssp ssr sss

a-ii aaaa aaab aaac aaai aaap aaar aaas aaba aabb aabc aabi aabp aaca aacb aacc aaci aacp aacr aacs aaib aaic aaii aais aapa aapc aapi aaps aara aarc aari aarp aars aasa aasc aasi aass abaa abab abac abai abap abar abas abb- abba abbb abbi abbr abbs abca abcb abcc abci abcp abcr abcs abia abib abic abir abis abpa abpc abpi abpp abpr abps abra abrc abri abrs abs- absa absi absp abss acaa acab acac acai acap acar acas acba acca accc acci accp accs aci- acia acic acip acir acis acpa acpi acpr acps acr- acra acrc acri acrr acrs acsa acsc acsi acss aiai aias aiba aica aicc aicp aicr aics aiia aiib aiic aiir aipa aipi aips aira airi airp airs aisa aisb aisi aisr apac apai apap apar apas apba apbr apbs apca apcb apcc apcr apcs api- apia apic apip apis appa appc appr apps apra aprc apri aprs apsa apsi apss arab arac arai arap arar aras arba arbi arbs arc- arca arci arcs aria arib arii arip aris arpa arpi arps arr- arra arrc arri arrr arrs ars- arsa arsc arsi asaa asab asac asai asap asar asas asba asc- asca ascb ascc asci ascp ascr asia asic asii asip asir asis aspa aspc aspi aspr asps asra asrc asrs assa assc assi assp assr asss ba-i baaa baar baas baba babb babi babr babs bac- baca bacc baci bacs baia baib baic bair bais bapa bapc bapi bapp baps bar- bara barb barc bari barr bars basa basc basi bass bbas bbbb bbbs bbci bbpr bbrc bcaa bcap bcar bcas bcbc bcbp bcbs bcca bccc bcci bccs bcia bcis bcpp bcps bcra bcrs bcsa bcsc bcss biap biar bias biba bibb bibi bibs bica bicc bici bics biis bipa bipp bips bira birb biri birr birs bis- bisa bisc bisp biss bpai bpcp bprc bpsa brab brac brai bras brca brcb bria bric bris brrr brrs brsb brsr bsaa bsac bsap bsas bsci bscp bscs bsic bspp bspr bsra bssc caaa caab caac caap caas caba cabi cabs cac- caca cacc caci cacr caia caib caic caip cair cais capa capb capc capi capp caps cara carb carc cari carp carr cars casa casb casc casi casp casr cass cbac cbar cbbc cbbs cbca cbcc cbcp cbcr cbcs cbia cbir cbpc cbpp cbsa cbsc cbsi ccaa ccab ccac ccai ccap ccar ccas ccba ccbc ccca cccb cccc ccci cccp cccs ccic ccii ccip ccir ccis ccpa ccpp ccpr ccps ccra ccrc ccri ccrp ccrs ccsa ccsi ccsp ccss ciaa ciar cias ciba cibc cibi cica cicc cici cicr cics ciia ciii ciis cipa cipp cips cira cirb circ ciri cirr cirs cis- cisa cisc cisp cisr ciss cpaa cpac cpap cpas cpbc cpca cpcs cpia cpic cppa cpps cpri cprs cpsa cpsc cpsr crab crac crai crap crar cras crbc crca crcc crcr cria crib cric crip cris crpc crps crsa crsp crss csaa csab csac csar csas cscb cscc csci cscr cscs csia csib csir csis cspa cspb cspc cspi csps csra csrc csrs cssa cssr iaaa iaac iaai iaap iaas iaba iaca iacc iacp iacr iacs iaia iais iapa iapp iaps iara iarc iars iasa iasc iasi iasp iasr ibac ibar ibas ibca ibcs ibia ibis ibra ibrc ibri ibsa ibss icaa icab icac icai icap icar icas icbc icbp icbs icca iccb iccc icci iccp iccr iccs icis icpa icpc icps icra icrc icrr icrs icsa icsb icsc icsi icsp icsr icss iiac iias iica iiii iiis iipa iira iirc iirs iisc iisi iisp iisr ipac ipas ipba ipca ipcc ipcs ippa ippc ippr ipri ipsa ipsc ipsi ipsp ipss irac irai irap irar iras irbp irca ircc ircs iri- iria iric irip iris irpa irpc irps irra irrc