a-a a-b aaa aab aag aak aam aao ab- aba abb abg abk abm abo ag- aga agb agg agk agm ago aka akb akg akk akm ako ama amb amg amk amm amo aoa aob aog aok aom aoo baa bab bag bak bam bao bba bbb bbg bbk bbm bbo bga bgb bgg bgk bgm bgo bka bkb bkg bkk bkm bko bma bmb bmg bmk bmm bmo boa bob bog bok bom boo gaa gab gag gak gam gao gba gbg gbk gbm gbo gga ggb ggg ggm ggo gka gkb gkm gko gma gmb gmg gmm gmo goa gob gog gok gom goo ka- kaa kab kag kak kam kao kba kbb kbk kbm kbo kga kgb kgm kgo kkb kkk kkm kma kmb kmg kmk kmm kmo koa kob kog kok kom koo m-o maa mab mag mak mam mao mba mbb mbg mbk mbm mbo mga mgb mgk mgm mgo mka mkb mkg mkk mkm mko mma mmb mmg mmk mmm mmo moa mob mog mok mom moo oaa oab oag oak oam oao ob- oba obb obg obk obm obo oga ogg ogo oka okb okg okk oko om- oma omb omg omm omo oo- ooa oob oog ook oom ooo