-ic a-a a-b a-c a-i a-t aaa aab aac aai aao aar aat ab- aba abb abc abi abo abr abt ac- aca acb acc aci aco acr act ai- aia aib aic aii aio air ait aoa aob aoc aoi aoo aor aot ar- ara arb arc ari aro arr art at- ata atb atc ati ato atr att baa bab bac bai bao bar bat bba bbb bbc bbi bbo bbr bbt bca bcb bcc bci bco bcr bct bi- bia bib bic bii bio bir bit boa bob boc boi boo bor bot bra brb bri bro brr brt bta btb btc bti bto btr btt c-- caa cab cac cai cao car cat cba cbb cbc cbi cbo cbr cbt cca ccb ccc cci cco ccr cct ci- cia cib cic cii cio cir cit co- coa cob coc coi coo cor cot cra crb crc cri cro crr crt cta ctb ctc cti cto ctr ctt ia- iaa iab iac iai iao iar iat iba ibb ibc ibi ibo ibr ibt ica icb icc ici ico icr ict iia iib iic iii iio iir iit io- ioa iob ioc ioi ioo ior iot ir- ira irb irc iri iro irr irt ita itb itc iti ito itt o-i oaa oab oac oai oao oar oat ob- oba obb obc obi obo obr obt oc- oca ocb occ oci oco ocr oct oia oib oic oii oio oir oit oo- ooa oob ooc ooi ooo oor oot or- ora orb orc ori oro orr ort ot- ota otb otc oti oto otr ott ra- raa rab rac rai rao rar rat rba rbb rbc rbi rbo rbr rbt rca rcb rcc rci rco rcr rct ria rib ric rii rio rir rit roa rob roc roi roo ror rot rra rrb rrc rri rrr rrt rta rtb rtc rti rto rtr rtt taa tab tac tai tao tar tat tba tbb tbc tbi tbo tbr tbt tca tcb tcc tci tco tcr tct tia tib tic tii tio tir tit to- toa tob toc toi too tor tot tra trb trc tri tro trr trt tta ttb ttc tti tto ttr ttt

a-ii aaaa aaab aaac aaai aaar aaba aabb aabc aabi aabt aaca aacb aacc aaci aaco aacr aact aaib aaic aaii aaoo aara aarc aari aaro aart aata aatc aatt abaa abab abac abai abar abat abb- abba abbb abbi abbo abbr abbt abca abcb abcc abci abcr abct abia abib abic abir abit aboa abob aboo abor abot abra abrc abri abro abta ac-t acaa acab acac acai acar acat acba acca accc acci acco acct aci- acia acic acir acoa acor acot acr- acra acrc acri acro acrr acta actc acti acto actt aiai aiba aibo aica aicc aicr aiia aiib aiic aiir aioc aioi aira airi airo airt aita aiti aitr aitt aoba aoca aora aorb aort aotc arab arac arai arar arat arba arbi arc- arca arci arco arct aria arib arii ario arit aroa arob aroi aroo aror arr- arra arrc arri arro arrr arrt arta artc arti arto artr at-t ataa atab atac atai atar atat atca atcc atco atcr atia atic atit atob atoc atoi ator atot atra atrc atri atro atta atti atto attr ba-i baaa baar baat baba babb babi babo babr bac- baca bacc baci baco bact baia baib baic baio bair bait bar- bara barb barc bari baro barr bart bata batc bati bato batt bbbb bbci bbrc bcaa bcar bcat bcbc bcca bccc bcci bcia bcit bcor bcra bctc biao biar biat biba bibb bibi bibo bica bicc bici bico bio- bioc bioi biot bira birb biri biro birr birt bita bitc bito bitt boab boac boai boar boat boba bobb bobi bobo boca boco boi- boii boit boob booc boor boot bor- bora bori boro borr bort bota botb boti boto bott brab brac brai brao brat brca brcb bria bric brio brit broa brob broc broo bror brot brrr brtc btaa btcc btob btor btrc btrt bttb c-bo caaa caab caac caat caba cabi cabo cac- caca cacc caci caco cacr caia caib caic caio cair cait caoi caor cara carb carc cari caro carr cart cat- cata catb catc cati cato catt cbac cbar cbat cbbc cbca cbcc cbcr cbct cbia cbir cbit cbot cbrt cbta cbtc ccaa ccab ccac ccai ccar ccat ccba ccbc ccca cccb cccc ccci ccic ccii ccir ccob ccoc ccra ccrc ccri ccrt cctb cctc cctt ciaa ciao ciar ciat ciba cibc cibi cibo cica cicc cici cico cicr cict ciia ciii ciit ciob cior cira cirb circ ciri ciro cirr cirt cita citb citi cito citt coai coat coba cobb cobi cobo coca coco coct coia coir coit coob coot cor- cora corb corc cori coro corr cort cota cotb cotc coti coto cott crab crac crai crar crat crbc crca crcc crcr cria crib cric crit crob croc croo cror crot crrt crtc ctab ctba ctbi ctca ctia ctic ctor ctot ctrc ctta iaaa iaac iaai iaat iaba iaca iacc iacr iact iaia iara iarc iart iata iatc iati ibac ibar ibat ibca ibia ibot ibra ibrc ibri ibro ibtb ibtc icaa icab icac icai icao icar icat icbc icca iccb iccc icci icco iccr icct icoc icor icra icrc icrr icrt icta iiac iica iiii iiio iiit iioi iioo iira iirc iita iitr iitt ioba iobi ioci ioii ioio ioit iooi iooo iora iori iota ioto irac irai irao irar irca ircc iri- iria iric irio irob iroc irra irrc irri irta irti itaa itac itai itar itat itia itic itoi itoo itor itra itri itta itto oaic oara obai obba obbo obia obit oboi obor obot obra obri obro ocab ocac ocat ocbc occa occc occi occt ocra ocro ocrr oct- octa octi octo oiba oici oiii oira oirt oita oitc oiti ooaa ooba oobi oocr ooia oooo oora oort ootb orab orac orai orao orar orat orba orbb orbi