-ic a-a a-b a-c a-i a-t aaa aab aac aae aag aai aak aao aas aat ab- aba abb abc abe abg abi abk abo abs abt ac- aca acb acc ace acg aci ack aco acs act aea aeb aec aee aeg aei aek aeo aes aet ag- aga agb agc age agg agi agk ago ags agt ai- aia aib aic aie aig aii aik aio ais ait aka akb akc ake akg aki akk ako aks aoa aob aoc aoe aog aoi aok aoo aos aot as- asa asb asc ase asg asi ask aso ass ast at- ata atb atc ate atg ati ato ats att baa bab bac bae bag bai bak bao bas bat bba bbb bbc bbe bbg bbi bbk bbo bbs bbt bca bcb bcc bce bcg bci bck bco bcs bct be- bea beb bec bee beg bei bek beo bes bet bga bgb bgc bge bgg bgi bgk bgo bgs bgt bi- bia bib bic bie big bii bik bio bis bit bka bkb bkc bke bkg bkk bko bks bkt boa bob boc boe bog boi bok boo bos bot bsa bsb bsc bse bsg bsi bsk bso bss bst bta btb btc bte btg bti btk bto bts btt c-- caa cab cac cae cag cai cak cao cas cat cba cbb cbc cbe cbg cbi cbk cbo cbs cbt cca ccb ccc cce ccg cci cck cco ccs cct ce- cea ceb cec cee ceg cei cek ceo ces cet cga cgb cgc cge cgg cgi cgo cgs cgt ci- cia cib cic cie cig cii cik cio cis cit cka ckb ckc cki cko cks ckt co- coa cob coc coe cog coi cok coo cos cot csa csb csc cse csg csi csk cso css cst cta ctb ctc cte ctg cti ctk cto cts ctt eaa eab eac eae eag eai eak eao eas eat eba ebb ebc ebe ebg ebi ebk ebo ebs ebt ec- eca ecb ecc ece ecg eci eck eco ecs ect eea eeb eec eee eeg eek eeo ees eet ega egb egc ege egg egi ego egs egt eia eib eic eie eig eii eik eio eis eit eka ekb ekc eke ekg eki eko eks ekt eo- eoa eob eoc eoe eog eoi eok eoo eos eot es- esa esb esc ese esg esi esk eso ess est eta etb etc ete etg eti etk eto ets ett gaa gab gac gae gag gai gak gao gas gat gba gbc gbe gbg gbi gbk gbo gbs gbt gca gcb gcc gce gcg gci gck gco gcs gct ge- gea geb gec gee geg gei gek geo ges get gga ggb ggc ggg ggi ggo ggs ggt gia gib gic gie gig gii gik gio gis git gka gkb gko gks gkt goa gob goc goe gog goi gok goo gos got gsa gsb gsc gse gsg gsi gsk gso gss gst gta gtb gtc gte gtg gti gtk gto gts gtt ia- iaa iab iac iae iag iai iao ias iat iba ibb ibc ibe ibg ibi ibk ibo ibs ibt ica icb icc ice icg ici ick ico ics ict ie- iea iec iee ieg iei iek ies iet iga igb igc ige igg igi igk igo igs igt iia iib iic iie iii iio iis iit ika ikb ikc ike iki ikk iko iks ikt io- ioa iob ioc ioe iog ioi ioo ios iot is- isa isb isc ise isg isi isk iso iss ist ita itb itc ite itg iti itk ito its itt k-t ka- kaa kab kac kae kag kai kak kao kas kat kba kbb kbc kbe kbi kbk kbo kbs kca kcb kcc kce kcg kci kck kcs kct ke- kea keb kec kee keg kei kek keo kes ket kga kgb kgc kgi kgo kgs kia kib kic kie kig kii kik kio kis kit kkb kkc kke kki kkk kks kkt koa kob koc koe kog koi kok koo kos kot ksa ksb ksc kse ksg ksi ksk kso kss kst kta ktb ktc kte ktg ktk kto kts ktt o-i oaa oab oac oae oag oai oak oao oas oat ob- oba obb obc obe obg obi obk obo obs obt oc- oca ocb occ ocg oci ock oco ocs oct oea oeb oec oee oeg oei oeo oes oet oga ogc oge ogg ogi ogo ogs ogt oia oib oic oie oii oik oio ois oit oka okb okc oke okg oki okk oko oks oo- ooa oob ooc oog ooi ook ooo oos oot os- osa osb osc ose osg osi osk oso oss ost ot- ota otb otc ote otg oti otk oto ots ott saa sab sac sae sag sai sak sao sas sat sba sbb sbc sbe sbg sbi sbk sbo sbs sbt sca scb scc sce scg sci sck sco scs sct se- sea seb sec see seg sei sek seo ses set sga sgb sgc sge sgg sgi sgk sgo sgs sgt sia sib sic sie sig sii sik sio sis sit sk- ska skb skc ske skg ski skk sko sks skt soa sob soc soe sog soi sok soo sos sot ss- ssa ssb ssc sse ssg ssi ssk sso sss sst sta stb stc ste stg sti stk sto sts stt taa tab tac tae tag tai tak tao tas tat tba tbb tbc tbe tbg tbi tbk tbo tbs tbt tca tcb tcc tce tcg tci tck tco tcs tct te- tea teb tec tee teg tei tek teo tes tet tga tgb tgc tge tgg tgi tgk tgo tgs tgt tia tib tic tie tig tii tik tio tis tit tka tkb tkc tke tkg tkk tko tks tkt to- toa tob toc toe tog toi tok too tos tot tsa tsb tsc tse tsg tsi tsk tso tss tst tta ttb ttc tte ttg tti ttk tto tts ttt