a-a a-b aaa aab aag aak aam aan aao aas ab- aba abb abg abk abm abn abo abs ag- aga agb agg agk agm agn ago ags aka akb akg akk akm akn ako aks ama amb amg amk amm amn amo ams an- ana anb ang ank anm ann ano ans aoa aob aog aok aom aon aoo aos as- asa asb asg ask asm asn aso ass baa bab bag bak bam ban bao bas bba bbb bbg bbk bbm bbn bbo bbs bga bgb bgg bgk bgm bgn bgo bgs bka bkb bkg bkk bkm bkn bko bks bma bmb bmg bmk bmm bmn bmo bms bna bnb bng bnk bnn bno bns boa bob bog bok bom bon boo bos bsa bsb bsg bsk bsm bsn bso bss gaa gab gag gak gam gan gao gas gba gbg gbk gbm gbn gbo gbs gga ggb ggg ggm ggn ggo ggs gka gkb gkm gkn gko gks gma gmb gmg gmm gmn gmo gms gna gnb gnm gnn gno gns goa gob gog gok gom gon goo gos gsa gsb gsg gsk gsm gsn gso gss ka- kaa kab kag kak kam kan kao kas kba kbb kbk kbm kbn kbo kbs kga kgb kgm kgo kgs kkb kkk kkm kkn kks kma kmb kmg kmk kmm kmo kms kn- kna kng knk knm knn kno koa kob kog kok kom kon koo kos ksa ksb ksg ksk ksm ksn kso kss m-o maa mab mag mak mam man mao mas mba mbb mbg mbk mbm mbo mbs mga mgb mgk mgm mgn mgo mgs mka mkb mkg mkk mkm mkn mko mks mma mmb mmg mmk mmm mmn mmo mms mna mnb mng mnk mnm mnn mno mns moa mob mog mok mom mon moo mos msa msb msg msk msm msn mso mss naa nab nag nak nam nan nao nas nba nbb nbg nbk nbm nbn nbo nbs nga ngb ngg ngk ngm ngn ngo ngs nka nkk nkm nkn nko nks nma nmb nmg nmk nmm nmn nmo nms nna nnb nng nnk nnm nnn nno nns no- noa nob nog nok nom non noo nos nsa nsb nsg nsk nsm nsn nso nss oaa oab oag oak oam oan oao oas ob- oba obb obg obk obm obn obo obs oga ogg ogn ogo ogs oka okb okg okk oko oks om- oma omb omg omm omn omo oms on- ona onb ong onk onn ono ons oo- ooa oob oog ook oom oon ooo oos os- osa osb osg osk osm osn oso oss saa sab sag sak sam san sao sas sba sbb sbg sbk sbm sbn sbo sbs sga sgb sgg sgk sgm sgn sgo sgs sk- ska skb skg skk skm sko sks sma smb smg smk smm smn smo sms sna snb sng snk snm snn sno sns soa sob sog sok som son soo sos ss- ssa ssb ssg ssk ssm ssn sso sss