a-a a-b aaa aab aad aag aak aan aao ab- aba abb abd abg abk abn abo ad- ada adb add adg adk adn ado ag- aga agb agd agg agk agn ago aka akb akd akg akk akn ako an- ana anb and ang ank ann ano aoa aob aod aog aok aon aoo baa bab bad bag bak ban bao bba bbb bbd bbg bbk bbn bbo bda bdb bdd bdg bdk bdo bga bgb bgd bgg bgk bgn bgo bka bkb bkg bkk bkn bko bna bnb bnd bng bnk bnn bno boa bob bod bog bok bon boo daa dab dad dag dak dan dao dba dbb dbd dbg dbk dbn dbo dda ddb ddd ddg ddk ddn ddo dga dgd dgg dgk dgn dka dkb dkg dkk dko dna dnb dnd dng dnk dnn dno doa dob dod dog dok don doo g-d gaa gab gad gag gak gan gao gba gbd gbg gbk gbn gbo gda gdb gdd gdk gdn gdo gga ggb ggd ggg ggn ggo gka gkb gkd gkn gko gna gnb gnd gnn gno goa gob god gog gok gon goo ka- kaa kab kad kag kak kan kao kba kbb kbd kbk kbn kbo kda kdb kdg kdk kdo kga kgb kgd kgo kkb kkk kkn kn- kna knd kng knk knn kno koa kob kod kog kok kon koo naa nab nad nag nak nan nao nba nbb nbd nbg nbk nbn nbo nda ndb ndd ndg ndk ndn ndo nga ngb ngd ngg ngk ngn ngo nka nkk nkn nko nna nnb nng nnk nnn nno no- noa nob nod nog nok non noo oaa oab oad oag oak oan oao ob- oba obb obd obg obk obn obo oda odb odd odg odn odo oga ogd ogg ogn ogo oka okb okd okg okk oko on- ona onb ond ong onk onn ono oo- ooa oob ood oog ook oon ooo