-ic a-a a-b a-c a-i aaa aab aac aae aaf aai aak aas ab- aba abb abc abe abf abi abk abs ac- aca acb acc ace acf aci ack acs aea aeb aec aee aef aei aek aes af- afa afb afc afe aff afi afk afs ai- aia aib aic aie aif aii aik ais aka akb akc ake aki akk aks as- asa asb asc ase asf asi ask ass baa bab bac bae baf bai bak bas bba bbb bbc bbe bbf bbi bbk bbs bca bcb bcc bce bcf bci bck bcs be- bea beb bec bee bef bei bek bes bfa bfb bfc bfe bff bfi bfs bi- bia bib bic bie bif bii bik bis bka bkb bkc bke bkf bkk bks bsa bsb bsc bse bsf bsi bsk bss c-- caa cab cac cae caf cai cak cas cba cbb cbc cbe cbf cbi cbk cbs cca ccb ccc cce ccf cci cck ccs ce- cea ceb cec cee cef cei cek ces cfa cfb cfc cfe cff cfi cfk cfs ci- cia cib cic cie cif cii cik cis cka ckb ckc cki cks csa csb csc cse csf csi csk css eaa eab eac eae eaf eai eak eas eba ebb ebc ebe ebf ebi ebk ebs ec- eca ecb ecc ece ecf eci eck ecs eea eeb eec eee eef eek ees ef- efa efb efc efe eff efi efs eia eib eic eie eif eii eik eis eka ekb ekc eke ekf eki eks es- esa esb esc ese esf esi esk ess faa fab fac fae faf fai fak fas fba fbb fbc fbe fbf fbi fbk fbs fca fcb fcc fce fcf fci fck fcs fea feb fec fee fef fei fek fes ffa ffc ffe fff ffi ffk ffs fia fib fic fie fif fii fik fis fka fkb fkc fkf fki fkk fsa fsb fsc fse fsf fsi fsk fss i-f ia- iaa iab iac iae iaf iai ias iba ibb ibc ibe ibf ibi ibk ibs ica icb icc ice icf ici ick ics ie- iea iec iee ief iei iek ies ifa ifb ifc ife iff ifi ifs iia iib iic iie iif iii iis ika ikb ikc ike ikf iki ikk iks is- isa isb isc ise isf isi isk iss ka- kaa kab kac kae kaf kai kak kas kba kbb kbc kbe kbf kbi kbk kbs kca kcb kcc kce kci kck kcs ke- kea keb kec kee kef kei kek kes kfa kfc kff kfi kfs kia kib kic kie kif kii kik kis kkb kkc kke kki kkk kks ksa ksb ksc kse ksf ksi ksk kss saa sab sac sae saf sai sak sas sba sbb sbc sbe sbf sbi sbk sbs sca scb scc sce scf sci sck scs se- sea seb sec see sef sei sek ses sfa sfb sfc sfe sff sfi sfk sfs sia sib sic sie sif sii sik sis sk- ska skb skc ske skf ski skk sks ss- ssa ssb ssc sse ssf ssi ssk sss

-ase a-ak a-be a-ii aaaa aaab aaac aaae aaaf aaai aaas aaba aabb aabc aabi aaca aacb aacc aace aacf aaci aack aacs aaea aaec aaes aafa aafb aafc aaff aafi aaib aaic aaii aais aaka aake aasa aasc aase aasf aasi aass abaa abab abac abae abaf abai abak abas abb- abba abbb abbe abbi abbs abca abcb abcc abcf abci abcs abec abee abes abff abia abib abic abie abis abs- absa abse absf absi abss acaa acab acac acae acai acas acba acca accc acce accf acci accs ace- acea acec acek aces acfc acfe acfi acfs aci- acia acic acie acif acis acke acks acsa acsc acse acsi acss aeac aeaf aeas aebi aebs aecb aeci aeka aesc aess afaa afak afbs afca afcb afcc afci afcs afee afek afes affa affc affi affs afia afib afif afik afis afka afsa afsb afsc aiai aias aiba aica aicc aice aicf aics aiea aiee aiff aifs aiia aiib aiic aika aike aiki aiks aisa aisb aise aisi aisk akaa akae akai akas akca akee akes akia akie akif akik akis akka akki aksa aksi asaa asab asac asae asaf asai asak asas asba asc- asca ascb ascc asce asci asea asec asee asek ases asfa asfi asia asic asie asif asii asik asis aska aske aski asks assa assc asse assi assk asss ba-i baaa baaf baak baas baba babb babe babi babs bac- baca bacc bace baci back bacs baek baes bafc baff baia baib baic baie baik bais bak- baka bake baki baks basa basc base basf basi bask bass bbas bbbb bbbs bbci bbeb bbfc bcaa bcas bcbc bcbs bcca bccc bcci bccs bcec bces bcfc bcia bcie bcis bcsa bcsc bcss beaf beak beas beba bebb bebe bebi beca beci beck becs beeb beef beek bees befa befe beff beia beic beik beis beka beke beki beks bes- besa bese besk bess bfas bfca bfcs bffs bfsi biaf biak bias biba bibb bibe bibi bibs bica bicc bice bici bick bics bieb bief bies bifa biff bifi biis bike bis- bisa bisc bise bisk biss bsaa bsac bsas bsci bscs bsea bseb bsec bsee bses bsfa bsfc bsff bsfs bsic bssc bsse caaa caab caac caaf caas caba cabe cabf cabi cabs cac- caca cacc cace caci cack caec caei caes cafa cafb cafc cafe caff cafs caia caib caic caik cais caka cake casa casb casc case casi cask cass cbac cbbc cbbs cbca cbcc cbce cbcs cbea cbec cbee cbef cbfb cbfc cbia cbka cbsa cbsc cbse cbsi ccaa ccab ccac ccaf ccai ccas ccba ccbc ccca cccb cccc cccf ccci cccs ccee ccfa ccfc ccff ccfi ccic ccii ccis ccsa ccsf ccsi ccss ceac ceas ceba cebs cec- ceca cece ceci cecs ceeb ceec cees cef- cefa cefc ceke cesa cesc cese cesi cess cfaa cfab cfac cfae cfbc cfbs cfca cfcb cfcf