-al -ol a-a a-b aaa aab aad aal aan aao aar ab- aba abb abd abl abn abo abr ad- ada adb add adl adn ado adr al- ala alb ald all aln alo alr an- ana anb and anl ann ano anr aoa aob aod aol aon aoo aor ar- ara arb ard arl arn aro arr baa bab bad bal ban bao bar bba bbb bbd bbl bbn bbo bbr bda bdb bdd bdl bdo bdr bla blb bld bll bln blo blr bna bnb bnd bnl bnn bno bnr boa bob bod bol bon boo bor bra brb brd brl brn bro brr daa dab dad dal dan dao dar dba dbb dbd dbl dbn dbo dbr dda ddb ddd ddl ddn ddo ddr dl- dla dlb dld dll dlo dlr dna dnb dnd dnl dnn dno dnr doa dob dod dol don doo dor dra drb drd drl drn dro drr la- laa lab lad lal lan lao lar lba lbb lbd lbl lbo lbr lda ldb ldd ldl ldn ldo ldr lla llb lld lll lln llo llr lna lnb lnd lnl lnn lno lnr loa lob lod lol lon loo lor lra lrb lrd lrn lro lrr naa nab nad nal nan nao nar nba nbb nbd nbl nbn nbo nbr nda ndb ndd ndl ndn ndo ndr nla nlb nld nll nln nlo nlr nna nnb nnl nnn nno no- noa nob nod nol non noo nor nra nrb nrd nrl nrn nro nrr oaa oab oad oal oan oao oar ob- oba obb obd obl obn obo obr oda odb odd odl odn odo odr ola olb old oll oln olo on- ona onb ond onl onn ono onr oo- ooa oob ood ool oon ooo oor or- ora orb ord orl orn oro orr ra- raa rab rad ral ran rao rar rba rbb rbd rbl rbn rbo rbr rda rdb rdd rdl rdn rdo rdr rla rld rll rln rlo rlr rna rnb rnd rnn rno rnr roa rob rod rol ron roo ror rra rrb rrd rrl rrn rrr