-ic a-a a-b a-c a-i a-t aaa aab aac aag aai aan aat ab- aba abb abc abg abi abn abt ac- aca acb acc acg aci acn act ag- aga agb agc agg agi agn agt ai- aia aib aic aig aii ain ait an- ana anb anc ang ani ann ant at- ata atb atc atg ati atn att baa bab bac bag bai ban bat bba bbb bbc bbg bbi bbn bbt bca bcb bcc bcg bci bcn bct bga bgb bgc bgg bgi bgn bgt bi- bia bib bic big bii bin bit bna bnb bnc bng bni bnn bnt bta btb btc btg bti btn btt c-- caa cab cac cag cai can cat cba cbb cbc cbg cbi cbn cbt cca ccb ccc ccg cci ccn cct cga cgb cgc cgg cgi cgn cgt ci- cia cib cic cig cii cin cit cn- cna cnb cnc cng cni cnn cnt cta ctb ctc ctg cti ctn ctt gaa gab gac gag gai gan gat gba gbc gbg gbi gbn gbt gca gcb gcc gcg gci gcn gct gga ggb ggc ggg ggi ggn ggt gia gib gic gig gii gin git gna gnb gnc gni gnn gnt gta gtb gtc gtg gti gtn gtt ia- iaa iab iac iag iai ian iat iba ibb ibc ibg ibi ibn ibt ica icb icc icg ici icn ict iga igb igc igg igi ign igt iia iib iic iii iin iit in- ina inb inc ing ini inn int ita itb itc itg iti itn itt n-i naa nab nac nag nai nan nat nba nbb nbc nbg nbi nbn nbt nca ncb ncc ncg nci ncn nct nga ngb ngc ngg ngi ngn ngt nia nib nic nig nii nin nit nna nnb nnc nng nni nnn nnt nta ntb ntc ntg nti ntn ntt taa tab tac tag tai tan tat tba tbb tbc tbg tbi tbn tbt tca tcb tcc tcg tci tcn tct tga tgb tgc tgg tgi tgn tgt tia tib tic tig tii tin tit tna tnb tnc tng tni tnn tnt tta ttb ttc ttg tti ttn ttt