-ic a-a a-b a-c a-i a-t aaa aab aac aag aai aan aar aat aau ab- aba abb abc abg abi abn abr abt abu ac- aca acb acc acg aci acn acr act acu ag- aga agb agc agg agi agn agr agt agu ai- aia aib aic aig aii ain air ait aiu an- ana anb anc ang ani ann anr ant anu ar- ara arb arc arg ari arn arr art aru at- ata atb atc atg ati atn atr att atu au- aua aub auc aug aui aun aur aut b-u baa bab bac bag bai ban bar bat bau bba bbb bbc bbg bbi bbn bbr bbt bbu bca bcb bcc bcg bci bcn bcr bct bcu bga bgb bgc bgg bgi bgn bgr bgt bgu bi- bia bib bic big bii bin bir bit biu bna bnb bnc bng bni bnn bnr bnt bnu bra brb brg bri brn brr brt bru bta btb btc btg bti btn btr btt btu bua bub buc bug bui bun bur but buu c-- caa cab cac cag cai can car cat cau cba cbb cbc cbg cbi cbn cbr cbt cbu cca ccb ccc ccg cci ccn ccr cct ccu cga cgb cgc cgg cgi cgn cgr cgt cgu ci- cia cib cic cig cii cin cir cit ciu cn- cna cnb cnc cng cni cnn cnr cnt cnu cra crb crc crg cri crn crr crt cru cta ctb ctc ctg cti ctn ctr ctt ctu cua cub cuc cug cui cun cur cut cuu gaa gab gac gag gai gan gar gat gau gba gbc gbg gbi gbn gbr gbt gbu gca gcb gcc gcg gci gcn gcr gct gcu gga ggb ggc ggg ggi ggn ggr ggt ggu gia gib gic gig gii gin gir git giu gna gnb gnc gni gnn gnr gnt gnu gra grb grc grg gri grn grr grt gru gta gtb gtc gtg gti gtn gtr gtt gtu gu- gua gub guc gug gui gun gur gut guu ia- iaa iab iac iag iai ian iar iat iau iba ibb ibc ibg ibi ibn ibr ibt ibu ica icb icc icg ici icn icr ict icu iga igb igc igg igi ign igr igt igu iia iib iic iii iin iir iit iiu in- ina inb inc ing ini inn inr int inu ir- ira irb irc irg iri irn irr irt iru ita itb itc itg iti itn itt itu iu- iua iub iuc iug iui iur iut n-i naa nab nac nag nai nan nar nat nau nba nbb nbc nbg nbi nbn nbr nbt nbu nca ncb ncc ncg nci ncn ncr nct ncu nga ngb ngc ngg ngi ngn ngt ngu nia nib nic nig nii nin nir nit niu nna nnb nnc nng nni nnn nnt nnu nra nrb nrc nrg nri nrn nrr nrt nru nta ntb ntc ntg nti ntn ntr ntt ntu nua nub nuc nug nui nun nur nut nuu ra- raa rab rac rag rai ran rar rat rau rba rbb rbc rbg rbi rbn rbr rbt rbu rca rcb rcc rcg rci rcn rcr rct rcu rga rgb rgc rgg rgi rgn rgr rgt ria rib ric rig rii rin rir rit rna rnb rnc rng rni rnn rnr rnt rnu rra rrb rrc rrg rri rrn rrr rrt rru rta rtb rtc rtg rti rtn rtr rtt rtu rua rub ruc rug rui run rur rut ruu taa tab tac tag tai tan tar tat tau tba tbb tbc tbg tbi tbn tbr tbt tbu tca tcb tcc tcg tci tcn tcr tct tcu tga tgb tgc tgg tgi tgn tgr tgt tgu tia tib tic tig tii tin tir tit tiu tna tnb tnc tng tni tnn tnr tnt tra trb trc trg tri trn trr trt tru tta ttb ttc ttg tti ttn ttr ttt ttu tua tub tuc tug tui tun tur tut tuu ua- uaa uab uac uag uai uan uar uat uau uba ubb ubc ubg ubi ubn ubr ubt ubu uca ucb ucc ucg uci ucn ucr uct ucu uga ugb ugc ugg ugi ugn ugr ugt ugu uia uib uic uig uii uin uir uit uiu un- una unb unc ung uni unn unr unt unu ur- ura urb urc urg uri urn urr urt uru uta utb utc uti utn utr utt utu uua uuc uug uun uur uut uuu