-ic a-a a-b a-c a-i a-t aaa aab aac aag aai aan aat aau ab- aba abb abc abg abi abn abt abu ac- aca acb acc acg aci acn act acu ag- aga agb agc agg agi agn agt agu ai- aia aib aic aig aii ain ait aiu an- ana anb anc ang ani ann ant anu at- ata atb atc atg ati atn att atu au- aua aub auc aug aui aun aut b-u baa bab bac bag bai ban bat bau bba bbb bbc bbg bbi bbn bbt bbu bca bcb bcc bcg bci bcn bct bcu bga bgb bgc bgg bgi bgn bgt bgu bi- bia bib bic big bii bin bit biu bna bnb bnc bng bni bnn bnt bnu bta btb btc btg bti btn btt btu bua bub buc bug bui bun but buu c-- caa cab cac cag cai can cat cau cba cbb cbc cbg cbi cbn cbt cbu cca ccb ccc ccg cci ccn cct ccu cga cgb cgc cgg cgi cgn cgt cgu ci- cia cib cic cig cii cin cit ciu cn- cna cnb cnc cng cni cnn cnt cnu cta ctb ctc ctg cti ctn ctt ctu cua cub cuc cug cui cun cut cuu gaa gab gac gag gai gan gat gau gba gbc gbg gbi gbn gbt gbu gca gcb gcc gcg gci gcn gct gcu gga ggb ggc ggg ggi ggn ggt ggu gia gib gic gig gii gin git giu gna gnb gnc gni gnn gnt gnu gta gtb gtc gtg gti gtn gtt gtu gu- gua gub guc gug gui gun gut guu ia- iaa iab iac iag iai ian iat iau iba ibb ibc ibg ibi ibn ibt ibu ica icb icc icg ici icn ict icu iga igb igc igg igi ign igt igu iia iib iic iii iin iit iiu in- ina inb inc ing ini inn int inu ita itb itc itg iti itn itt itu iu- iua iub iuc iug iui iut n-i naa nab nac nag nai nan nat nau nba nbb nbc nbg nbi nbn nbt nbu nca ncb ncc ncg nci ncn nct ncu nga ngb ngc ngg ngi ngn ngt ngu nia nib nic nig nii nin nit niu nna nnb nnc nng nni nnn nnt nnu nta ntb ntc ntg nti ntn ntt ntu nua nub nuc nug nui nun nut nuu taa tab tac tag tai tan tat tau tba tbb tbc tbg tbi tbn tbt tbu tca tcb tcc tcg tci tcn tct tcu tga tgb tgc tgg tgi tgn tgt tgu tia tib tic tig tii tin tit tiu tna tnb tnc tng tni tnn tnt tta ttb ttc ttg tti ttn ttt ttu tua tub tuc tug tui tun tut tuu ua- uaa uab uac uag uai uan uat uau uba ubb ubc ubg ubi ubn ubt ubu uca ucb ucc ucg uci ucn uct ucu uga ugb ugc ugg ugi ugn ugt ugu uia uib uic uig uii uin uit uiu un- una unb unc ung uni unn unt unu uta utb utc uti utn utt utu uua uuc uug uun uut uuu