a-a a-b a-i a-t aaa aab aag aai aan aar aat aau ab- aba abb abg abi abn abr abt abu ag- aga agb agg agi agn agr agt agu ai- aia aib aig aii ain air ait aiu an- ana anb ang ani ann anr ant anu ar- ara arb arg ari arn arr art aru at- ata atb atg ati atn atr att atu au- aua aub aug aui aun aur aut b-u baa bab bag bai ban bar bat bau bba bbb bbg bbi bbn bbr bbt bbu bga bgb bgg bgi bgn bgr bgt bgu bi- bia bib big bii bin bir bit biu bna bnb bng bni bnn bnr bnt bnu bra brb brg bri brn brr brt bru bta btb btg bti btn btr btt btu bua bub bug bui bun bur but buu gaa gab gag gai gan gar gat gau gba gbg gbi gbn gbr gbt gbu gga ggb ggg ggi ggn ggr ggt ggu gia gib gig gii gin gir git giu gna gnb gni gnn gnr gnt gnu gra grb grg gri grn grr grt gru gta gtb gtg gti gtn gtr gtt gtu gu- gua gub gug gui gun gur gut guu ia- iaa iab iag iai ian iar iat iau iba ibb ibg ibi ibn ibr ibt ibu iga igb igg igi ign igr igt igu iia iib iii iin iir iit iiu in- ina inb ing ini inn inr int inu ir- ira irb irg iri irn irr irt iru ita itb itg iti itn itt itu iu- iua iub iug iui iur iut n-i naa nab nag nai nan nar nat nau nba nbb nbg nbi nbn nbr nbt nbu nga ngb ngg ngi ngn ngt ngu nia nib nig nii nin nir nit niu nna nnb nng nni nnn nnt nnu nra nrb nrg nri nrn nrr nrt nru nta ntb ntg nti ntn ntr ntt ntu nua nub nug nui nun nur nut nuu ra- raa rab rag rai ran rar rat rau rba rbb rbg rbi rbn rbr rbt rbu rga rgb rgg rgi rgn rgr rgt ria rib rig rii rin rir rit rna rnb rng rni rnn rnr rnt rnu rra rrb rrg rri rrn rrr rrt rru rta rtb rtg rti rtn rtr rtt rtu rua rub rug rui run rur rut ruu taa tab tag tai tan tar tat tau tba tbb tbg tbi tbn tbr tbt tbu tga tgb tgg tgi tgn tgr tgt tgu tia tib tig tii tin tir tit tiu tna tnb tng tni tnn tnr tnt tra trb trg tri trn trr trt tru tta ttb ttg tti ttn ttr ttt ttu tua tub tug tui tun tur tut tuu ua- uaa uab uag uai uan uar uat uau uba ubb ubg ubi ubn ubr ubt ubu uga ugb ugg ugi ugn ugr ugt ugu uia uib uig uii uin uir uit uiu un- una unb ung uni unn unr unt unu ur- ura urb urg uri urn urr urt uru uta utb uti utn utr utt utu uua uug uun uur uut uuu