-ic a-a a-b a-c a-i a-t aaa aab aac aag aai aan aas aat aau ab- aba abb abc abg abi abn abs abt abu ac- aca acb acc acg aci acn acs act acu ag- aga agb agc agg agi agn ags agt agu ai- aia aib aic aig aii ain ais ait aiu an- ana anb anc ang ani ann ans ant anu as- asa asb asc asg asi asn ass ast asu at- ata atb atc atg ati atn ats att atu au- aua aub auc aug aui aun aus aut b-u baa bab bac bag bai ban bas bat bau bba bbb bbc bbg bbi bbn bbs bbt bbu bca bcb bcc bcg bci bcn bcs bct bcu bga bgb bgc bgg bgi bgn bgs bgt bgu bi- bia bib bic big bii bin bis bit biu bna bnb bnc bng bni bnn bns bnt bnu bsa bsb bsc bsg bsi bsn bss bst bsu bta btb btc btg bti btn bts btt btu bua bub buc bug bui bun bus but buu c-- caa cab cac cag cai can cas cat cau cba cbb cbc cbg cbi cbn cbs cbt cbu cca ccb ccc ccg cci ccn ccs cct ccu cga cgb cgc cgg cgi cgn cgs cgt cgu ci- cia cib cic cig cii cin cis cit ciu cn- cna cnb cnc cng cni cnn cns cnt cnu csa csb csc csg csi csn css cst csu cta ctb ctc ctg cti ctn cts ctt ctu cua cub cuc cug cui cun cus cut cuu gaa gab gac gag gai gan gas gat gau gba gbc gbg gbi gbn gbs gbt gbu gca gcb gcc gcg gci gcn gcs gct gcu gga ggb ggc ggg ggi ggn ggs ggt ggu gia gib gic gig gii gin gis git giu gna gnb gnc gni gnn gns gnt gnu gsa gsb gsc gsg gsi gsn gss gst gsu gta gtb gtc gtg gti gtn gts gtt gtu gu- gua gub guc gug gui gun gus gut guu ia- iaa iab iac iag iai ian ias iat iau iba ibb ibc ibg ibi ibn ibs ibt ibu ica icb icc icg ici icn ics ict icu iga igb igc igg igi ign igs igt igu iia iib iic iii iin iis iit iiu in- ina inb inc ing ini inn ins int inu is- isa isb isc isg isi isn iss ist isu ita itb itc itg iti itn its itt itu iu- iua iub iuc iug iui ius iut n-i naa nab nac nag nai nan nas nat nau nba nbb nbc nbg nbi nbn nbs nbt nbu nca ncb ncc ncg nci ncn ncs nct ncu nga ngb ngc ngg ngi ngn ngs ngt ngu nia nib nic nig nii nin nis nit niu nna nnb nnc nng nni nnn nns nnt nnu nsa nsb nsc nsg nsi nsn nss nst nsu nta ntb ntc ntg nti ntn nts ntt ntu nua nub nuc nug nui nun nus nut nuu saa sab sac sag sai san sas sat sau sba sbb sbc sbg sbi sbn sbs sbt sbu sca scb scc scg sci scn scs sct scu sga sgb sgc sgg sgi sgn sgs sgt sgu sia sib sic sig sii sin sis sit siu sna snb snc sng sni snn sns snt snu ss- ssa ssb ssc ssg ssi ssn sss sst ssu sta stb stc stg sti stn sts stt stu sua sub suc sug sui sun sus sut suu taa tab tac tag tai tan tas tat tau tba tbb tbc tbg tbi tbn tbs tbt tbu tca tcb tcc tcg tci tcn tcs tct tcu tga tgb tgc tgg tgi tgn tgs tgt tgu tia tib tic tig tii tin tis tit tiu tna tnb tnc tng tni tnn tns tnt tsa tsb tsc tsg tsi tsn tss tst tsu tta ttb ttc ttg tti ttn tts ttt ttu tua tub tuc tug tui tun tus tut tuu ua- uaa uab uac uag uai uan uas uat uau uba ubb ubc ubg ubi ubn ubs ubt ubu uca ucb ucc ucg uci ucn ucs uct ucu uga ugb ugc ugg ugi ugn ugs ugt ugu uia uib uic uig uii uin uis uit uiu un- una unb unc ung uni unn uns unt unu usa usb usc usg usi usn uss ust usu uta utb utc uti utn uts utt utu uua uuc uug uun uus uut uuu