a-a a-b a-t aaa aab aag aao aar aat aau aay ab- aba abb abg abo abr abt abu aby ag- aga agb agg ago agr agt agu agy aoa aob aog aoo aor aot aou ar- ara arb arg aro arr art aru ary at- ata atb atg ato atr att atu au- aua aub aug auo aur aut ay- aya ayo ayr ayt ayu b-u baa bab bag bao bar bat bau bay bba bbb bbg bbo bbr bbt bbu bby bga bgb bgg bgo bgr bgt bgu boa bob bog boo bor bot bou boy bra brb brg bro brr brt bru bry bta btb btg bto btr btt btu bty bua bub bug buo bur but buu buy by- bya byg byo byr byt byu gaa gab gag gao gar gat gau gay gba gbg gbo gbr gbt gbu gby gga ggb ggg ggo ggr ggt ggu goa gob gog goo gor got gou goy gra grb grg gro grr grt gru gry gta gtb gtg gto gtr gtt gtu gty gu- gua gub gug guo gur gut guu guy gy- gya gyb gyo gyr oaa oab oag oao oar oat oau ob- oba obb obg obo obr obt obu oby oga ogg ogo ogt ogy oo- ooa oob oog ooo oor oot or- ora orb org oro orr ort oru ory ot- ota otb otg oto otr ott otu ou- oua ouo our out oya oyo ra- raa rab rag rao rar rat rau ray rba rbb rbg rbo rbr rbt rbu rga rgb rgg rgo rgr rgt roa rob rog roo ror rot rou roy rra rrb rrg rrr rrt rru rta rtb rtg rto rtr rtt rtu rty rua rub rug ruo rur rut ruu ruy ry- rya ryg ryo ryr ryu ryy taa tab tag tao tar tat tau tay tba tbb tbg tbo tbr tbt tbu tga tgb tgg tgo tgr tgt tgu tgy to- toa tob tog too tor tot tou toy tra trb trg tro trr trt tru try tta ttb ttg tto ttr ttt ttu tty tua tub tug tuo tur tut tuu tuy tya tyg tyo tyr tyt ua- uaa uab uag uao uar uat uau uay uba ubb ubg ubo ubr ubt ubu uby uga ugb ugg ugo ugr ugt ugu uoa uob uog uoo uor uot ur- ura urb urg uro urr urt uru ury uta utb uto utr utt utu uty uua uug uur uut uuu uyo uyu yaa yab yag yao yar yat yau yay ybg ybr yby yga ygo yob yog yoo yor yot you yoy yra yrg yro yrt yru yta yto ytr ytt ytu yua yug yuo yur yut yuu yuy yyb yyg yyt yyu yyy