a-a a-b a-c aaa aab aac aag aak aam aan aao ab- aba abb abc abg abk abm abn abo ac- aca acb acc acg ack acm acn aco ag- aga agb agc agg agk agm agn ago aka akb akc akg akk akm akn ako ama amb amc amg amk amm amn amo an- ana anb anc ang ank anm ann ano aoa aob aoc aog aok aom aon aoo baa bab bac bag bak bam ban bao bba bbb bbc bbg bbk bbm bbn bbo bca bcb bcc bcg bck bcm bcn bco bga bgb bgc bgg bgk bgm bgn bgo bka bkb bkc bkg bkk bkm bkn bko bma bmb bmc bmg bmk bmm bmn bmo bna bnb bnc bng bnk bnn bno boa bob boc bog bok bom bon boo c-- caa cab cac cag cak cam can cao cba cbb cbc cbg cbk cbm cbn cbo cca ccb ccc ccg cck ccm ccn cco cga cgb cgc cgg cgm cgn cgo cka ckb ckc ckm cko cma cmb cmc cmg cmk cmm cmn cmo cn- cna cnb cnc cng cnm cnn cno co- coa cob coc cog cok com con coo gaa gab gac gag gak gam gan gao gba gbc gbg gbk gbm gbn gbo gca gcb gcc gcg gck gcm gcn gco gga ggb ggc ggg ggm ggn ggo gka gkb gkm gkn gko gma gmb gmc gmg gmm gmn gmo gna gnb gnc gnm gnn gno goa gob goc gog gok gom gon goo ka- kaa kab kac kag kak kam kan kao kba kbb kbc kbk kbm kbn kbo kca kcb kcc kcg kck kcm kcn kga kgb kgc kgm kgo kkb kkc kkk kkm kkn kma kmb kmc kmg kmk kmm kmo kn- kna knc kng knk knm knn kno koa kob koc kog kok kom kon koo m-o maa mab mac mag mak mam man mao mba mbb mbc mbg mbk mbm mbo mc- mca mcb mcc mcg mck mcm mcn mco mga mgb mgc mgk mgm mgn mgo mka mkb mkc mkg mkk mkm mkn mko mma mmb mmc mmg mmk mmm mmn mmo mna mnb mnc mng mnk mnm mnn mno moa mob moc mog mok mom mon moo naa nab nac nag nak nam nan nao nba nbb nbc nbg nbk nbm nbn nbo nca ncb ncc ncg nck ncm ncn nco nga ngb ngc ngg ngk ngm ngn ngo nka nkc nkk nkm nkn nko nma nmb nmc nmg nmk nmm nmn nmo nna nnb nnc nng nnk nnm nnn nno no- noa nob noc nog nok nom non noo oaa oab oac oag oak oam oan oao ob- oba obb obc obg obk obm obn obo oc- oca ocb occ ocg ock ocm ocn oco oga ogc ogg ogn ogo oka okb okc okg okk oko om- oma omb omc omg omm omn omo on- ona onb onc ong onk onn ono oo- ooa oob ooc oog ook oom oon ooo