-ic a-a a-b a-c a-i aaa aab aac aai aao aar aas ab- aba abb abc abi abo abr abs ac- aca acb acc aci aco acr acs ai- aia aib aic aii aio air ais aoa aob aoc aoi aoo aor aos ar- ara arb arc ari aro arr ars as- asa asb asc asi aso asr ass baa bab bac bai bao bar bas bba bbb bbc bbi bbo bbr bbs bca bcb bcc bci bco bcr bcs bi- bia bib bic bii bio bir bis boa bob boc boi boo bor bos bra brb bri bro brr brs bsa bsb bsc bsi bso bsr bss c-- caa cab cac cai cao car cas cba cbb cbc cbi cbo cbr cbs cca ccb ccc cci cco ccr ccs ci- cia cib cic cii cio cir cis co- coa cob coc coi coo cor cos cra crb crc cri cro crr crs csa csb csc csi cso csr css ia- iaa iab iac iai iao iar ias iba ibb ibc ibi ibo ibr ibs ica icb icc ici ico icr ics iia iib iic iii iio iir iis io- ioa iob ioc ioi ioo ior ios ir- ira irb irc iri iro irr irs is- isa isb isc isi iso isr iss o-i oaa oab oac oai oao oar oas ob- oba obb obc obi obo obr obs oc- oca ocb occ oci oco ocr ocs oia oib oic oii oio oir ois oo- ooa oob ooc ooi ooo oor oos or- ora orb orc ori oro orr ors os- osa osb osc osi oso osr oss ra- raa rab rac rai rao rar ras rba rbb rbc rbi rbo rbr rbs rca rcb rcc rci rco rcr rcs ria rib ric rii rio rir ris roa rob roc roi roo ror ros rra rrb rrc rri rrr rrs rsa rsb rsc rsi rso rsr rss saa sab sac sai sao sar sas sba sbb sbc sbi sbo sbr sbs sca scb scc sci sco scr scs sia sib sic sii sio sir sis soa sob soc soi soo sor sos sr- sra srb src sri sro srr srs ss- ssa ssb ssc ssi sso ssr sss

a-ii aaaa aaab aaac aaai aaar aaas aaba aabb aabc aabi aaca aacb aacc aaci aaco aacr aacs aaib aaic aaii aais aaoo aara aarc aari aaro aars aasa aasc aasi aass abaa abab abac abai abar abas abb- abba abbb abbi abbo abbr abbs abca abcb abcc abci abcr abcs abia abib abic abir abis aboa abob aboo abor abos abra abrc abri abro abrs abs- absa absi abss acaa acab acac acai acar acas acba acca accc acci acco accs aci- acia acic acir acis acoa acor acos acr- acra acrc acri acro acrr acrs acsa acsc acsi acss aiai aias aiba aibo aica aicc aicr aics aiia aiib aiic aiir aioc aioi aira airi airo airs aisa aisb aisi aiso aisr aoba aoca aocs aora aorb aors aoss arab arac arai arar aras arba arbi arbs arc- arca arci arco arcs aria arib arii ario aris aroa arob aroi aroo aror aros arr- arra arrc arri arro arrr arrs ars- arsa arsc arsi arso asaa asab asac asai asao asar asas asba asbo asc- asca ascb ascc asci asco ascr asia asic asii asio asir asis asob asoc asoi asor asos asra asrc asro asrs assa assc assi asso assr asss ba-i baaa baar baas baba babb babi babo babr babs bac- baca bacc baci baco bacs baia baib baic baio bair bais baos bar- bara barb barc bari baro barr bars basa basc basi baso bass bbas bbbb bbbs bbci bbrc bcaa bcar bcas bcbc bcbs bcca bccc bcci bccs bcia bcis bcor bcos bcra bcrs bcsa bcsc bcss biao biar bias biba bibb bibi bibo bibs bica bicc bici bico bics biis bio- bioc bioi bios bira birb biri biro birr birs bis- bisa bisc biso biss boab boac boai boar boas boba bobb bobi bobo bobs boca boco bocs boi- boii bois boob booc boor boos bor- bora bori boro borr bors bosa bosc bosi boso boss brab brac brai brao bras brca brcb bria bric brio bris broa brob broc broo bror bros brrr brrs brsb brsr bsaa bsac bsas bsci bscs bsic bsos bsra bssc c-bo caaa caab caac caas caba cabi cabo cabs cac- caca cacc caci caco cacr caia caib caic caio cair cais caoi caor caos cara carb carc cari caro carr cars casa casb casc casi caso casr cass cbac cbar cbbc cbbs cbca cbcc cbcr cbcs cbia cbir cbsa cbsc cbsi ccaa ccab ccac ccai ccar ccas ccba ccbc ccca cccb cccc ccci cccs ccic ccii ccir ccis ccob ccoc ccra ccrc ccri ccrs ccsa ccsi ccss ciaa ciao ciar cias ciba cibc cibi cibo cica cicc cici cico cicr cics ciia ciii ciis ciob cior cios cira cirb circ ciri ciro cirr cirs cis- cisa cisc cisr ciss coai coas coba cobb cobi cobo cobs coca coco coia coir cois coob coos cor- cora corb corc cori coro corr cors cosa cosc cosi coso coss crab crac crai crar cras crbc crca crcc crcr cria crib cric cris crob croc croo cror crsa crss csaa csab csac csao csar csas cscb cscc csci csco cscr cscs csia csib csio csir csis csob csor csos csra csrc csrs cssa cssr iaaa iaac iaai iaas iaba iaca iacc iacr iacs iaia iais iara iarc iars iasa iasc iasi iaso iasr ibac ibar ibas ibca ibcs ibia ibis ibos ibra ibrc ibri ibro ibsa ibss icaa icab icac icai icao icar icas icbc icbs icca iccb iccc icci icco iccr iccs icis icoc icor icos icra icrc icrr icrs icsa icsb icsc icsi icsr icss iiac iias iica iiii iiio iiis iioi iioo iios iira iirc iirs iisc iisi iisr ioba iobi ioci ioii ioio iooi iooo ioos iora iori iors ioso irac irai irao irar iras irca ircc ircs iri-