a-a a-b a-t aaa aab aag aan aao aar aat aay ab- aba abb abg abn abo abr abt aby ag- aga agb agg agn ago agr agt agy an- ana anb ang ann ano anr ant any aoa aob aog aon aoo aor aot ar- ara arb arg arn aro arr art ary at- ata atb atg atn ato atr att ay- aya ayn ayo ayr ayt baa bab bag ban bao bar bat bay bba bbb bbg bbn bbo bbr bbt bby bga bgb bgg bgn bgo bgr bgt bna bnb bng bnn bno bnr bnt boa bob bog bon boo bor bot boy bra brb brg brn bro brr brt bry bta btb btg btn bto btr btt bty by- bya byg byn byo byr byt gaa gab gag gan gao gar gat gay gba gbg gbn gbo gbr gbt gby gga ggb ggg ggn ggo ggr ggt gna gnb gnn gno gnr gnt goa gob gog gon goo gor got goy gra grb grg grn gro grr grt gry gta gtb gtg gtn gto gtr gtt gty gy- gya gyb gyn gyo gyr naa nab nag nan nao nar nat nay nba nbb nbg nbn nbo nbr nbt nga ngb ngg ngn ngo ngt nna nnb nng nnn nno nnt no- noa nob nog non noo nor not noy nra nrb nrg nrn nro nrr nrt nry nta ntb ntg ntn nto ntr ntt nya nyg nyn nyo nyt nyy oaa oab oag oan oao oar oat ob- oba obb obg obn obo obr obt oby oga ogg ogn ogo ogt ogy on- ona onb ong onn ono onr ont ony oo- ooa oob oog oon ooo oor oot or- ora orb org orn oro orr ort ory ot- ota otb otg otn oto otr ott oya oyo ra- raa rab rag ran rao rar rat ray rba rbb rbg rbn rbo rbr rbt rga rgb rgg rgn rgo rgr rgt rna rnb rng rnn rno rnr rnt rny roa rob rog ron roo ror rot roy rra rrb rrg rrn rrr rrt rta rtb rtg rtn rto rtr rtt rty ry- rya ryg ryn ryo ryr ryy taa tab tag tan tao tar tat tay tba tbb tbg tbn tbo tbr tbt tga tgb tgg tgn tgo tgr tgt tgy tna tnb tng tnn tno tnr tnt to- toa tob tog ton too tor tot toy tra trb trg trn tro trr trt try tta ttb ttg ttn tto ttr ttt tty tya tyg tyn tyo tyr tyt yaa yab yag yan yao yar yat yay ybg ybr yby yga ygo yna yng ynn yny yob yog yon yoo yor yot yoy yra yrg yrn yro yrt yta ytn yto ytr ytt yyb yyg yyt yyy