-al -ol a-a a-b aaa aab aad aak aal aan aao ab- aba abb abd abk abl abn abo ad- ada adb add adk adl adn ado aka akb akd akk akl akn ako al- ala alb ald alk all aln alo an- ana anb and ank anl ann ano aoa aob aod aok aol aon aoo baa bab bad bak bal ban bao bba bbb bbd bbk bbl bbn bbo bda bdb bdd bdk bdl bdo bka bkb bkk bkl bkn bko bla blb bld blk bll bln blo bna bnb bnd bnk bnl bnn bno boa bob bod bok bol bon boo daa dab dad dak dal dan dao dba dbb dbd dbk dbl dbn dbo dda ddb ddd ddk ddl ddn ddo dka dkb dkk dkl dko dl- dla dlb dld dlk dll dlo dna dnb dnd dnk dnl dnn dno doa dob dod dok dol don doo ka- kaa kab kad kak kal kan kao kba kbb kbd kbk kbl kbn kbo kda kdb kdk kdl kdo kkb kkk kkl kkn kl- kla klb kld klo kn- kna knd knk knl knn kno koa kob kod kok kol kon koo la- laa lab lad lak lal lan lao lba lbb lbd lbk lbl lbo lda ldb ldd ldk ldl ldn ldo lka lkb lkl lla llb lld llk lll lln llo lna lnb lnd lnk lnl lnn lno loa lob lod lok lol lon loo naa nab nad nak nal nan nao nba nbb nbd nbk nbl nbn nbo nda ndb ndd ndk ndl ndn ndo nka nkk nkn nko nla nlb nld nlk nll nln nlo nna nnb nnk nnl nnn nno no- noa nob nod nok nol non noo oaa oab oad oak oal oan oao ob- oba obb obd obk obl obn obo oda odb odd odl odn odo oka okb okd okk okl oko ola olb old olk oll oln olo on- ona onb ond onk onl onn ono oo- ooa oob ood ook ool oon ooo