-ic a-a a-b a-c a-i a-t aaa aab aac aae aag aai aak aan aas aat ab- aba abb abc abe abg abi abk abn abs abt ac- aca acb acc ace acg aci ack acn acs act aea aeb aec aee aeg aei aek aen aes aet ag- aga agb agc age agg agi agk agn ags agt ai- aia aib aic aie aig aii aik ain ais ait aka akb akc ake akg aki akk akn aks an- ana anb anc ane ang ani ank ann ans ant as- asa asb asc ase asg asi ask asn ass ast at- ata atb atc ate atg ati atn ats att baa bab bac bae bag bai bak ban bas bat bba bbb bbc bbe bbg bbi bbk bbn bbs bbt bca bcb bcc bce bcg bci bck bcn bcs bct be- bea beb bec bee beg bei bek ben bes bet bga bgb bgc bge bgg bgi bgk bgn bgs bgt bi- bia bib bic bie big bii bik bin bis bit bka bkb bkc bke bkg bkk bkn bks bkt bna bnb bnc bne bng bni bnk bnn bns bnt bsa bsb bsc bse bsg bsi bsk bsn bss bst bta btb btc bte btg bti btk btn bts btt c-- caa cab cac cae cag cai cak can cas cat cba cbb cbc cbe cbg cbi cbk cbn cbs cbt cca ccb ccc cce ccg cci cck ccn ccs cct ce- cea ceb cec cee ceg cei cek cen ces cet cga cgb cgc cge cgg cgi cgn cgs cgt ci- cia cib cic cie cig cii cik cin cis cit cka ckb ckc cki cks ckt cn- cna cnb cnc cne cng cni cnn cns cnt csa csb csc cse csg csi csk csn css cst cta ctb ctc cte ctg cti ctk ctn cts ctt eaa eab eac eae eag eai eak ean eas eat eba ebb ebc ebe ebg ebi ebk ebn ebs ebt ec- eca ecb ecc ece ecg eci eck ecn ecs ect eea eeb eec eee eeg eek een ees eet ega egb egc ege egg egi egn egs egt eia eib eic eie eig eii eik ein eis eit eka ekb ekc eke ekg eki eks ekt en- ena enb enc ene eng eni enk enn ens ent es- esa esb esc ese esg esi esk esn ess est eta etb etc ete etg eti etk etn ets ett gaa gab gac gae gag gai gak gan gas gat gba gbc gbe gbg gbi gbk gbn gbs gbt gca gcb gcc gce gcg gci gck gcn gcs gct ge- gea geb gec gee geg gei gek gen ges get gga ggb ggc ggg ggi ggn ggs ggt gia gib gic gie gig gii gik gin gis git gka gkb gkn gks gkt gna gnb gnc gne gni gnn gns gnt gsa gsb gsc gse gsg gsi gsk gsn gss gst gta gtb gtc gte gtg gti gtk gtn gts gtt ia- iaa iab iac iae iag iai ian ias iat iba ibb ibc ibe ibg ibi ibk ibn ibs ibt ica icb icc ice icg ici ick icn ics ict ie- iea iec iee ieg iei iek ien ies iet iga igb igc ige igg igi igk ign igs igt iia iib iic iie iii iin iis iit ika ikb ikc ike iki ikk iks ikt in- ina inb inc ine ing ini ink inn ins int is- isa isb isc ise isg isi isk isn iss ist ita itb itc ite itg iti itk itn its itt k-t ka- kaa kab kac kae kag kai kak kan kas kat kba kbb kbc kbe kbi kbk kbn kbs kca kcb kcc kce kcg kci kck kcn kcs kct ke- kea keb kec kee keg kei kek ken kes ket kga kgb kgc kgi kgs kia kib kic kie kig kii kik kin kis kit kkb kkc kke kki kkk kkn kks kkt kn- kna knc kne kng kni knk knn knt ksa ksb ksc kse ksg ksi ksk ksn kss kst kta ktb ktc kte ktg ktk ktn kts ktt n-i naa nab nac nae nag nai nak nan nas nat nba nbb nbc nbe nbg nbi nbk nbn nbs nbt nca ncb ncc nce ncg nci nck ncn ncs nct ne- nea neb nec nee neg nei nek nen nes net nga ngb ngc nge ngg ngi ngk ngn ngs ngt nia nib nic nie nig nii nik nin nis nit nka nkc nke nki nkk nkn nks nkt nna nnb nnc nne nng nni nnk nnn nns nnt nsa nsb nsc nse nsg nsi nsk nsn nss nst nta ntb ntc nte ntg nti ntk ntn nts ntt saa sab sac sae sag sai sak san sas sat sba sbb sbc sbe sbg sbi sbk sbn sbs sbt sca scb scc sce scg sci sck scn scs sct se- sea seb sec see seg sei sek sen ses set sga sgb sgc sge sgg sgi sgk sgn sgs sgt sia sib sic sie sig sii sik sin sis sit sk- ska skb skc ske skg ski skk sks skt sna snb snc sne sng sni snk snn sns snt ss- ssa ssb ssc sse ssg ssi ssk ssn sss sst sta stb stc ste stg sti stk stn sts stt taa tab tac tae tag tai tak tan tas tat tba tbb tbc tbe tbg tbi tbk tbn tbs tbt tca tcb tcc tce tcg tci tck tcn tcs tct te- tea teb tec tee teg tei tek ten tes tet tga tgb tgc tge tgg tgi tgk tgn tgs tgt tia tib tic tie tig tii tik tin tis tit tka tkb tkc tke tkg tkk tks tkt tna tnb tnc tne tng tni tnk tnn tns tnt tsa tsb tsc tse tsg tsi tsk tsn tss tst tta ttb ttc tte ttg tti ttk ttn tts ttt