-al -ol a-a a-b aaa aab aad aak aal aan aao aar ab- aba abb abd abk abl abn abo abr ad- ada adb add adk adl adn ado adr aka akb akd akk akl akn ako akr al- ala alb ald alk all aln alo alr an- ana anb and ank anl ann ano anr aoa aob aod aok aol aon aoo aor ar- ara arb ard ark arl arn aro arr baa bab bad bak bal ban bao bar bba bbb bbd bbk bbl bbn bbo bbr bda bdb bdd bdk bdl bdo bdr bka bkb bkk bkl bkn bko bkr bla blb bld blk bll bln blo blr bna bnb bnd bnk bnl bnn bno bnr boa bob bod bok bol bon boo bor bra brb brd brk brl brn bro brr daa dab dad dak dal dan dao dar dba dbb dbd dbk dbl dbn dbo dbr dda ddb ddd ddk ddl ddn ddo ddr dka dkb dkk dkl dko dkr dl- dla dlb dld dlk dll dlo dlr dna dnb dnd dnk dnl dnn dno dnr doa dob dod dok dol don doo dor dra drb drd drk drl drn dro drr ka- kaa kab kad kak kal kan kao kar kba kbb kbd kbk kbl kbn kbo kbr kda kdb kdk kdl kdo kdr kkb kkk kkl kkn kkr kl- kla klb kld klo klr kn- kna knd knk knl knn kno knr koa kob kod kok kol kon koo kor kra krd krk krl krn kro krr la- laa lab lad lak lal lan lao lar lba lbb lbd lbk lbl lbo lbr lda ldb ldd ldk ldl ldn ldo ldr lka lkb lkl lkr lla llb lld llk lll lln llo llr lna lnb lnd lnk lnl lnn lno lnr loa lob lod lok lol lon loo lor lra lrb lrd lrk lrn lro lrr naa nab nad nak nal nan nao nar nba nbb nbd nbk nbl nbn nbo nbr nda ndb ndd ndk ndl ndn ndo ndr nka nkk nkn nko nkr nla nlb nld nlk nll nln nlo nlr nna nnb nnk nnl nnn nno no- noa nob nod nok nol non noo nor nra nrb nrd nrk nrl nrn nro nrr oaa oab oad oak oal oan oao oar ob- oba obb obd obk obl obn obo obr oda odb odd odl odn odo odr oka okb okd okk okl oko okr ola olb old olk oll oln olo on- ona onb ond onk onl onn ono onr oo- ooa oob ood ook ool oon ooo oor or- ora orb ord ork orl orn oro orr ra- raa rab rad rak ral ran rao rar rba rbb rbd rbk rbl rbn rbo rbr rda rdb rdd rdl rdn rdo rdr rkb rkk rko rla rld rll rln rlo rlr rna rnb rnd rnn rno rnr roa rob rod rok rol ron roo ror rra rrb rrd rrk rrl rrn rrr