a-a a-b a-i a-t aaa aab aag aai aan aar aat aay ab- aba abb abg abi abn abr abt aby ag- aga agb agg agi agn agr agt agy ai- aia aib aig aii ain air ait aiy an- ana anb ang ani ann anr ant any ar- ara arb arg ari arn arr art ary at- ata atb atg ati atn atr att ay- aya ayi ayn ayr ayt baa bab bag bai ban bar bat bay bba bbb bbg bbi bbn bbr bbt bby bga bgb bgg bgi bgn bgr bgt bi- bia bib big bii bin bir bit biy bna bnb bng bni bnn bnr bnt bra brb brg bri brn brr brt bry bta btb btg bti btn btr btt bty by- bya byg byi byn byr byt gaa gab gag gai gan gar gat gay gba gbg gbi gbn gbr gbt gby gga ggb ggg ggi ggn ggr ggt gia gib gig gii gin gir git giy gna gnb gni gnn gnr gnt gra grb grg gri grn grr grt gry gta gtb gtg gti gtn gtr gtt gty gy- gya gyb gyn gyr ia- iaa iab iag iai ian iar iat iba ibb ibg ibi ibn ibr ibt iby iga igb igg igi ign igr igt igy iia iib iii iin iir iit in- ina inb ing ini inn inr int iny ir- ira irb irg iri irn irr irt iry ita itb itg iti itn itt ity iya iyr iyt iyy n-i naa nab nag nai nan nar nat nay nba nbb nbg nbi nbn nbr nbt nga ngb ngg ngi ngn ngt nia nib nig nii nin nir nit nna nnb nng nni nnn nnt nra nrb nrg nri nrn nrr nrt nry nta ntb ntg nti ntn ntr ntt nya nyg nyn nyt nyy ra- raa rab rag rai ran rar rat ray rba rbb rbg rbi rbn rbr rbt rga rgb rgg rgi rgn rgr rgt ria rib rig rii rin rir rit riy rna rnb rng rni rnn rnr rnt rny rra rrb rrg rri rrn rrr rrt rta rtb rtg rti rtn rtr rtt rty ry- rya ryg ryn ryr ryy taa tab tag tai tan tar tat tay tba tbb tbg tbi tbn tbr tbt tga tgb tgg tgi tgn tgr tgt tgy tia tib tig tii tin tir tit tiy tna tnb tng tni tnn tnr tnt tra trb trg tri trn trr trt try tta ttb ttg tti ttn ttr ttt tty tya tyg tyn tyr tyt yaa yab yag yai yan yar yat yay ybg ybi ybr yby yga yig yii yin yir yit yna yng ynn yny yra yrg yrn yrt yta ytn ytr ytt yyb yyg yyt yyy