a-a a-b aaa aab aad aag aao aar aay ab- aba abb abd abg abo abr aby ad- ada adb add adg ado adr ady ag- aga agb agd agg ago agr agy aoa aob aod aog aoo aor ar- ara arb ard arg aro arr ary ay- aya ayd ayo ayr baa bab bad bag bao bar bay bba bbb bbd bbg bbo bbr bby bda bdb bdd bdg bdo bdr bdy bga bgb bgd bgg bgo bgr boa bob bod bog boo bor boy bra brb brd brg bro brr bry by- bya byd byg byo byr daa dab dad dag dao dar day dba dbb dbd dbg dbo dbr dby dda ddb ddd ddg ddo ddr ddy dga dgd dgg dgr doa dob dod dog doo dor doy dra drb drd drg dro drr dry dy- dya dyb dyd dyo dyr dyy g-d gaa gab gad gag gao gar gay gba gbd gbg gbo gbr gby gda gdb gdd gdo gdr gga ggb ggd ggg ggo ggr goa gob god gog goo gor goy gra grb grd grg gro grr gry gy- gya gyb gyd gyo gyr oaa oab oad oag oao oar ob- oba obb obd obg obo obr oby oda odb odd odg odo odr oga ogd ogg ogo ogy oo- ooa oob ood oog ooo oor or- ora orb ord org oro orr ory oya oyd oyo ra- raa rab rad rag rao rar ray rba rbb rbd rbg rbo rbr rda rdb rdd rdg rdo rdr rdy rga rgb rgd rgg rgo rgr roa rob rod rog roo ror roy rra rrb rrd rrg rrr ry- rya ryd ryg ryo ryr ryy yaa yab yad yag yao yar yay ybg ybr yby yda ydg ydo ydy yga ygo yob yod yog yoo yor yoy yra yrg yro yyb yyg yyy