-ic a-a a-b a-c a-i a-t aaa aab aac aag aai aan aas aat ab- aba abb abc abg abi abn abs abt ac- aca acb acc acg aci acn acs act ag- aga agb agc agg agi agn ags agt ai- aia aib aic aig aii ain ais ait an- ana anb anc ang ani ann ans ant as- asa asb asc asg asi asn ass ast at- ata atb atc atg ati atn ats att baa bab bac bag bai ban bas bat bba bbb bbc bbg bbi bbn bbs bbt bca bcb bcc bcg bci bcn bcs bct bga bgb bgc bgg bgi bgn bgs bgt bi- bia bib bic big bii bin bis bit bna bnb bnc bng bni bnn bns bnt bsa bsb bsc bsg bsi bsn bss bst bta btb btc btg bti btn bts btt c-- caa cab cac cag cai can cas cat cba cbb cbc cbg cbi cbn cbs cbt cca ccb ccc ccg cci ccn ccs cct cga cgb cgc cgg cgi cgn cgs cgt ci- cia cib cic cig cii cin cis cit cn- cna cnb cnc cng cni cnn cns cnt csa csb csc csg csi csn css cst cta ctb ctc ctg cti ctn cts ctt gaa gab gac gag gai gan gas gat gba gbc gbg gbi gbn gbs gbt gca gcb gcc gcg gci gcn gcs gct gga ggb ggc ggg ggi ggn ggs ggt gia gib gic gig gii gin gis git gna gnb gnc gni gnn gns gnt gsa gsb gsc gsg gsi gsn gss gst gta gtb gtc gtg gti gtn gts gtt ia- iaa iab iac iag iai ian ias iat iba ibb ibc ibg ibi ibn ibs ibt ica icb icc icg ici icn ics ict iga igb igc igg igi ign igs igt iia iib iic iii iin iis iit in- ina inb inc ing ini inn ins int is- isa isb isc isg isi isn iss ist ita itb itc itg iti itn its itt n-i naa nab nac nag nai nan nas nat nba nbb nbc nbg nbi nbn nbs nbt nca ncb ncc ncg nci ncn ncs nct nga ngb ngc ngg ngi ngn ngs ngt nia nib nic nig nii nin nis nit nna nnb nnc nng nni nnn nns nnt nsa nsb nsc nsg nsi nsn nss nst nta ntb ntc ntg nti ntn nts ntt saa sab sac sag sai san sas sat sba sbb sbc sbg sbi sbn sbs sbt sca scb scc scg sci scn scs sct sga sgb sgc sgg sgi sgn sgs sgt sia sib sic sig sii sin sis sit sna snb snc sng sni snn sns snt ss- ssa ssb ssc ssg ssi ssn sss sst sta stb stc stg sti stn sts stt taa tab tac tag tai tan tas tat tba tbb tbc tbg tbi tbn tbs tbt tca tcb tcc tcg tci tcn tcs tct tga tgb tgc tgg tgi tgn tgs tgt tia tib tic tig tii tin tis tit tna tnb tnc tng tni tnn tns tnt tsa tsb tsc tsg tsi tsn tss tst tta ttb ttc ttg tti ttn tts ttt