-ic a-a a-b a-c a-i a-t aaa aab aac aag aai aas aat aau ab- aba abb abc abg abi abs abt abu ac- aca acb acc acg aci acs act acu ag- aga agb agc agg agi ags agt agu ai- aia aib aic aig aii ais ait aiu as- asa asb asc asg asi ass ast asu at- ata atb atc atg ati ats att atu au- aua aub auc aug aui aus aut b-u baa bab bac bag bai bas bat bau bba bbb bbc bbg bbi bbs bbt bbu bca bcb bcc bcg bci bcs bct bcu bga bgb bgc bgg bgi bgs bgt bgu bi- bia bib bic big bii bis bit biu bsa bsb bsc bsg bsi bss bst bsu bta btb btc btg bti bts btt btu bua bub buc bug bui bus but buu c-- caa cab cac cag cai cas cat cau cba cbb cbc cbg cbi cbs cbt cbu cca ccb ccc ccg cci ccs cct ccu cga cgb cgc cgg cgi cgs cgt cgu ci- cia cib cic cig cii cis cit ciu csa csb csc csg csi css cst csu cta ctb ctc ctg cti cts ctt ctu cua cub cuc cug cui cus cut cuu gaa gab gac gag gai gas gat gau gba gbc gbg gbi gbs gbt gbu gca gcb gcc gcg gci gcs gct gcu gga ggb ggc ggg ggi ggs ggt ggu gia gib gic gig gii gis git giu gsa gsb gsc gsg gsi gss gst gsu gta gtb gtc gtg gti gts gtt gtu gu- gua gub guc gug gui gus gut guu ia- iaa iab iac iag iai ias iat iau iba ibb ibc ibg ibi ibs ibt ibu ica icb icc icg ici ics ict icu iga igb igc igg igi igs igt igu iia iib iic iii iis iit iiu is- isa isb isc isg isi iss ist isu ita itb itc itg iti its itt itu iu- iua iub iuc iug iui ius iut saa sab sac sag sai sas sat sau sba sbb sbc sbg sbi sbs sbt sbu sca scb scc scg sci scs sct scu sga sgb sgc sgg sgi sgs sgt sgu sia sib sic sig sii sis sit siu ss- ssa ssb ssc ssg ssi sss sst ssu sta stb stc stg sti sts stt stu sua sub suc sug sui sus sut suu taa tab tac tag tai tas tat tau tba tbb tbc tbg tbi tbs tbt tbu tca tcb tcc tcg tci tcs tct tcu tga tgb tgc tgg tgi tgs tgt tgu tia tib tic tig tii tis tit tiu tsa tsb tsc tsg tsi tss tst tsu tta ttb ttc ttg tti tts ttt ttu tua tub tuc tug tui tus tut tuu ua- uaa uab uac uag uai uas uat uau uba ubb ubc ubg ubi ubs ubt ubu uca ucb ucc ucg uci ucs uct ucu uga ugb ugc ugg ugi ugs ugt ugu uia uib uic uig uii uis uit uiu usa usb usc usg usi uss ust usu uta utb utc uti uts utt utu uua uuc uug uus uut uuu