a-a a-b aaa aab aag aam aao aar aay ab- aba abb abg abm abo abr aby ag- aga agb agg agm ago agr agy ama amb amg amm amo amr amy aoa aob aog aom aoo aor ar- ara arb arg arm aro arr ary ay- aya ayo ayr baa bab bag bam bao bar bay bba bbb bbg bbm bbo bbr bby bga bgb bgg bgm bgo bgr bma bmb bmg bmm bmo bmr boa bob bog bom boo bor boy bra brb brg brm bro brr bry by- bya byg bym byo byr gaa gab gag gam gao gar gay gba gbg gbm gbo gbr gby gga ggb ggg ggm ggo ggr gma gmb gmg gmm gmo gmr gmy goa gob gog gom goo gor goy gra grb grg grm gro grr gry gy- gya gyb gym gyo gyr m-o m-r maa mab mag mam mao mar may mba mbb mbg mbm mbo mbr mga mgb mgm mgo mgr mgy mma mmb mmg mmm mmo mmr moa mob mog mom moo mor moy mra mrb mrg mrm mro mrr mry my- mya myb myg mym myo myr oaa oab oag oam oao oar ob- oba obb obg obm obo obr oby oga ogg ogo ogy om- oma omb omg omm omo omr omy oo- ooa oob oog oom ooo oor or- ora orb org orm oro orr ory oya oyo ra- raa rab rag ram rao rar ray rba rbb rbg rbm rbo rbr rga rgb rgg rgo rgr rma rmb rmg rmm rmo rmr roa rob rog rom roo ror roy rra rrb rrg rrm rrr ry- rya ryg rym ryo ryr ryy yaa yab yag yam yao yar yay ybg ybm ybr yby yga ygm ygo yma ymg ymm ymo yob yog yom yoo yor yoy yra yrg yro yyb yyg yyy