-ic a-a a-b a-c a-i a-t aaa aab aac aaf aag aai aak aao aar aas aat ab- aba abb abc abf abg abi abk abo abr abs abt ac- aca acb acc acf acg aci ack aco acr acs act af- afa afb afc aff afg afi afk afo afr afs aft ag- aga agb agc agf agg agi agk ago agr ags agt ai- aia aib aic aif aig aii aik aio air ais ait aka akb akc akg aki akk ako akr aks aoa aob aoc aof aog aoi aok aoo aor aos aot ar- ara arb arc arf arg ari ark aro arr ars art as- asa asb asc asf asg asi ask aso asr ass ast at- ata atb atc atf atg ati ato atr ats att baa bab bac baf bag bai bak bao bar bas bat bba bbb bbc bbf bbg bbi bbk bbo bbr bbs bbt bca bcb bcc bcf bcg bci bck bco bcr bcs bct bfa bfb bfc bff bfg bfi bfo bfr bfs bft bga bgb bgc bgf bgg bgi bgk bgo bgr bgs bgt bi- bia bib bic bif big bii bik bio bir bis bit bka bkb bkc bkf bkg bkk bko bkr bks bkt boa bob boc bof bog boi bok boo bor bos bot bra brb brf brg bri brk bro brr brs brt bsa bsb bsc bsf bsg bsi bsk bso bsr bss bst bta btb btc btf btg bti btk bto btr bts btt c-- caa cab cac caf cag cai cak cao car cas cat cba cbb cbc cbf cbg cbi cbk cbo cbr cbs cbt cca ccb ccc ccf ccg cci cck cco ccr ccs cct cfa cfb cfc cff cfg cfi cfk cfo cfr cfs cft cga cgb cgc cgg cgi cgo cgr cgs cgt ci- cia cib cic cif cig cii cik cio cir cis cit cka ckb ckc cki cko cks ckt co- coa cob coc cof cog coi cok coo cor cos cot cra crb crc crf crg cri crk cro crr crs crt csa csb csc csf csg csi csk cso csr css cst cta ctb ctc ctf ctg cti ctk cto ctr cts ctt faa fab fac faf fag fai fak fao far fas fat fba fbb fbc fbf fbg fbi fbk fbo fbr fbs fbt fca fcb fcc fcf fcg fci fck fco fcr fcs fct ffa ffc fff ffg ffi ffk ffo ffr ffs fft fga fgb fgc fgf fgg fgi fgr fgs fgt fia fib fic fif fig fii fik fir fis fit fka fkb fkc fkf fkg fki fkk fkt foa fob foc fof fog foi fok foo for fos fot fra frb frc frf frg fri frk fro frr frs frt fsa fsb fsc fsf fsg fsi fsk fso fsr fss fst fta ftb ftc ftf ftg fti ftk fto ftr fts ftt gaa gab gac gaf gag gai gak gao gar gas gat gba gbc gbf gbg gbi gbk gbo gbr gbs gbt gca gcb gcc gcf gcg gci gck gco gcr gcs gct gfa gfb gfc gff gfi gfk gfo gfr gfs gft gga ggb ggc ggg ggi ggo ggr ggs ggt gia gib gic gif gig gii gik gio gir gis git gka gkb gko gks gkt goa gob goc gof gog goi gok goo gor gos got gra grb grc grf grg gri grk gro grr grs grt gsa gsb gsc gsf gsg gsi gsk gso gsr gss gst gta gtb gtc gtf gtg gti gtk gto gtr gts gtt i-f ia- iaa iab iac iaf iag iai iao iar ias iat iba ibb ibc ibf ibg ibi ibk ibo ibr ibs ibt ica icb icc icf icg ici ick ico icr ics ict ifa ifb ifc iff ifg ifi ifo ifr ifs ift iga igb igc igf igg igi igk igo igr igs igt iia iib iic iif iii iio iir iis iit ika ikb ikc ikf iki ikk iko ikr iks ikt io- ioa iob ioc iof iog ioi ioo ior ios iot ir- ira irb irc irf irg iri irk iro irr irs irt is- isa isb isc isf isg isi isk iso isr iss ist ita itb itc itf itg iti itk ito its itt k-t ka- kaa kab kac kaf kag kai kak kao kar kas kat kba kbb kbc kbf kbi kbk kbo kbr kbs kca kcb kcc kcg kci kck kcr kcs kct kfa kfc kff kfg kfi kfo kfs kga kgb kgc kgf kgi kgo kgs kia kib kic kif kig kii kik kio kir kis kit kkb kkc kki kkk kkr kks kkt koa kob koc kof kog koi kok koo kor kos kot kra krc krf krg kri krk kro krr krs krt ksa ksb ksc ksf ksg ksi ksk kso ksr kss kst kta ktb ktc ktf ktg ktk kto ktr kts ktt o-i oaa oab oac oaf oag oai oak oao oar oas oat ob- oba obb obc obf obg obi obk obo obr obs obt oc- oca ocb occ ocf ocg oci ock oco ocr ocs oct of- ofa ofb ofc off ofg ofi ofo ofr ofs oft oga ogc ogf ogg ogi ogo ogs ogt oia oib oic oif oii oik oio oir ois oit oka okb okc okg oki okk oko okr oks oo- ooa oob ooc oof oog ooi ook ooo oor oos oot or- ora orb orc orf org ori ork oro orr ors ort os- osa osb osc osf osg osi osk oso osr oss ost ot- ota otb otc otf otg oti otk oto otr ots ott ra- raa rab rac raf rag rai rak rao rar ras rat rba rbb rbc rbf rbg rbi rbk rbo rbr rbs rbt rca rcb rcc rcf rcg rci rco rcr rcs rct rfa rfb rfc rff rfg rfi rfk rfo rfr rfs rft rga rgb rgc rgf rgg rgi rgk rgo rgr rgs rgt ria rib ric rif rig