a-a a-b aaa aab aag aah aam aao aar ab- aba abb abg abh abm abo abr ag- aga agb agg agh agm ago agr aha ahb ahg ahh ahm aho ahr ama amb amg amh amm amo amr aoa aob aog aoh aom aoo aor ar- ara arb arg arh arm aro arr baa bab bag bah bam bao bar bba bbb bbg bbh bbm bbo bbr bga bgb bgg bgh bgm bgo bgr bha bhb bhg bhh bhm bho bhr bma bmb bmg bmh bmm bmo bmr boa bob bog boh bom boo bor bra brb brg brh brm bro brr gaa gab gag gah gam gao gar gba gbg gbh gbm gbo gbr gga ggb ggg ggh ggm ggo ggr gha ghb ghg ghh gho ghr gma gmb gmg gmh gmm gmo gmr goa gob gog goh gom goo gor gra grb grg grh grm gro grr haa hab hag hah ham hao har hba hbb hbg hbh hbm hbo hbr hga hgb hgg hgh hgm hgo hgr hha hhb hhg hhh hhm hho hhr hma hmb hmg hmh hmm hmo hmr hoa hob hog hoh hom hoo hor hr- hra hrb hrg hrh hrm hro hrr m-o m-r maa mab mag mah mam mao mar mba mbb mbg mbh mbm mbo mbr mga mgb mgh mgm mgo mgr mha mhg mhh mhm mho mhr mma mmb mmg mmh mmm mmo mmr moa mob mog moh mom moo mor mra mrb mrg mrh mrm mro mrr oaa oab oag oah oam oao oar ob- oba obb obg obh obm obo obr oga ogg ogh ogo oha ohg ohh ohm oho ohr om- oma omb omg omh omm omo omr oo- ooa oob oog ooh oom ooo oor or- ora orb org orh orm oro orr ra- raa rab rag rah ram rao rar rba rbb rbg rbh rbm rbo rbr rga rgb rgg rgh rgo rgr rh- rha rhb rhg rhh rhm rho rhr rma rmb rmg rmh rmm rmo rmr roa rob rog roh rom roo ror rra rrb rrg rrh rrm rrr