-ic a-a a-b a-c a-i a-t aaa aab aac aag aai aak aan aao aar aat ab- aba abb abc abg abi abk abn abo abr abt ac- aca acb acc acg aci ack acn aco acr act ag- aga agb agc agg agi agk agn ago agr agt ai- aia aib aic aig aii aik ain aio air ait aka akb akc akg aki akk akn ako akr an- ana anb anc ang ani ank ann ano anr ant aoa aob aoc aog aoi aok aon aoo aor aot ar- ara arb arc arg ari ark arn aro arr art at- ata atb atc atg ati atn ato atr att baa bab bac bag bai bak ban bao bar bat bba bbb bbc bbg bbi bbk bbn bbo bbr bbt bca bcb bcc bcg bci bck bcn bco bcr bct bga bgb bgc bgg bgi bgk bgn bgo bgr bgt bi- bia bib bic big bii bik bin bio bir bit bka bkb bkc bkg bkk bkn bko bkr bkt bna bnb bnc bng bni bnk bnn bno bnr bnt boa bob boc bog boi bok bon boo bor bot bra brb brg bri brk brn bro brr brt bta btb btc btg bti btk btn bto btr btt c-- caa cab cac cag cai cak can cao car cat cba cbb cbc cbg cbi cbk cbn cbo cbr cbt cca ccb ccc ccg cci cck ccn cco ccr cct cga cgb cgc cgg cgi cgn cgo cgr cgt ci- cia cib cic cig cii cik cin cio cir cit cka ckb ckc cki cko ckt cn- cna cnb cnc cng cni cnn cno cnr cnt co- coa cob coc cog coi cok con coo cor cot cra crb crc crg cri crk crn cro crr crt cta ctb ctc ctg cti ctk ctn cto ctr ctt gaa gab gac gag gai gak gan gao gar gat gba gbc gbg gbi gbk gbn gbo gbr gbt gca gcb gcc gcg gci gck gcn gco gcr gct gga ggb ggc ggg ggi ggn ggo ggr ggt gia gib gic gig gii gik gin gio gir git gka gkb gkn gko gkt gna gnb gnc gni gnn gno gnr gnt goa gob goc gog goi gok gon goo gor got gra grb grc grg gri grk grn gro grr grt gta gtb gtc gtg gti gtk gtn gto gtr gtt ia- iaa iab iac iag iai ian iao iar iat iba ibb ibc ibg ibi ibk ibn ibo ibr ibt ica icb icc icg ici ick icn ico icr ict iga igb igc igg igi igk ign igo igr igt iia iib iic iii iin iio iir iit ika ikb ikc iki ikk iko ikr ikt in- ina inb inc ing ini ink inn ino inr int io- ioa iob ioc iog ioi ion ioo ior iot ir- ira irb irc irg iri irk irn iro irr irt ita itb itc itg iti itk itn ito itt k-t ka- kaa kab kac kag kai kak kan kao kar kat kba kbb kbc kbi kbk kbn kbo kbr kca kcb kcc kcg kci kck kcn kcr kct kga kgb kgc kgi kgo kia kib kic kig kii kik kin kio kir kit kkb kkc kki kkk kkn kkr kkt kn- kna knc kng kni knk knn kno knr knt koa kob koc kog koi kok kon koo kor kot kra krc krg kri krk krn kro krr krt kta ktb ktc ktg ktk ktn kto ktr ktt n-i naa nab nac nag nai nak nan nao nar nat nba nbb nbc nbg nbi nbk nbn nbo nbr nbt nca ncb ncc ncg nci nck ncn nco ncr nct nga ngb ngc ngg ngi ngk ngn ngo ngt nia nib nic nig nii nik nin nio nir nit nka nkc nki nkk nkn nko nkr nkt nna nnb nnc nng nni nnk nnn nno nnt no- noa nob noc nog noi nok non noo nor not nra nrb nrc nrg nri nrk nrn nro nrr nrt nta ntb ntc ntg nti ntk ntn nto ntr ntt o-i oaa oab oac oag oai oak oan oao oar oat ob- oba obb obc obg obi obk obn obo obr obt oc- oca ocb occ ocg oci ock ocn oco ocr oct oga ogc ogg ogi ogn ogo ogt oia oib oic oii oik oin oio oir oit oka okb okc okg oki okk oko okr on- ona onb onc ong oni onk onn ono onr ont oo- ooa oob ooc oog ooi ook oon ooo oor oot or- ora orb orc org ori ork orn oro orr ort ot- ota otb otc otg oti otk otn oto otr ott ra- raa rab rac rag rai rak ran rao rar rat rba rbb rbc rbg rbi rbk rbn rbo rbr rbt rca rcb rcc rcg rci rcn rco rcr rct rga rgb rgc rgg rgi rgk rgn rgo rgr rgt ria rib ric rig rii rik rin rio rir rit rkb rkc rkg rkk rko rkt rna rnb rnc rng rni rnn rno rnr rnt roa rob roc rog roi rok ron roo ror rot rra rrb rrc rrg rri rrk rrn rrr rrt rta rtb rtc rtg rti rtk rtn rto rtr rtt taa tab tac tag tai tak tan tao tar tat tba tbb tbc tbg tbi tbk tbn tbo tbr tbt tca tcb tcc tcg tci tck tcn tco tcr tct tga tgb tgc tgg tgi tgk tgn tgo tgr tgt tia tib tic tig tii tik tin tio tir tit tka tkb tkc tkg tkk tko tkr tkt tna tnb tnc tng tni tnk tnn tno tnr tnt to- toa tob toc tog toi tok ton too tor tot tra trb trc trg tri trk trn tro trr trt tta ttb ttc ttg tti ttk ttn tto ttr ttt