-al -ol a-a a-b aaa aab aad aal aan aao aar aau ab- aba abb abd abl abn abo abr abu ad- ada adb add adl adn ado adr adu al- ala alb ald all aln alo alr alu an- ana anb and anl ann ano anr anu aoa aob aod aol aon aoo aor aou ar- ara arb ard arl arn aro arr aru au- aua aub aud aul aun auo aur b-u baa bab bad bal ban bao bar bau bba bbb bbd bbl bbn bbo bbr bbu bda bdb bdd bdl bdo bdr bdu bla blb bld bll bln blo blr blu bna bnb bnd bnl bnn bno bnr bnu boa bob bod bol bon boo bor bou bra brb brd brl brn bro brr bru bua bub bud bul bun buo bur buu daa dab dad dal dan dao dar dau dba dbb dbd dbl dbn dbo dbr dbu dda ddb ddd ddl ddn ddo ddr ddu dl- dla dlb dld dll dlo dlr dlu dna dnb dnd dnl dnn dno dnr doa dob dod dol don doo dor dou dra drb drd drl drn dro drr dru dua dub dud dul dun duo dur la- laa lab lad lal lan lao lar lau lba lbb lbd lbl lbo lbr lbu lda ldb ldd ldl ldn ldo ldr ldu lla llb lld lll lln llo llr llu lna lnb lnd lnl lnn lno lnr lnu loa lob lod lol lon loo lor lou lra lrb lrd lrn lro lrr lru lua lub lud lul lun luo lur luu naa nab nad nal nan nao nar nau nba nbb nbd nbl nbn nbo nbr nbu nda ndb ndd ndl ndn ndo ndr ndu nla nlb nld nll nln nlo nlr nlu nna nnb nnl nnn nno nnu no- noa nob nod nol non noo nor nou nra nrb nrd nrl nrn nro nrr nru nua nub nud nul nun nuo nur nuu oaa oab oad oal oan oao oar oau ob- oba obb obd obl obn obo obr obu oda odb odd odl odn odo odr odu ola olb old oll oln olo olu on- ona onb ond onl onn ono onr onu oo- ooa oob ood ool oon ooo oor or- ora orb ord orl orn oro orr oru ou- oua oud oul oun ouo our ra- raa rab rad ral ran rao rar rau rba rbb rbd rbl rbn rbo rbr rbu rda rdb rdd rdl rdn rdo rdr rdu rla rld rll rln rlo rlr rlu rna rnb rnd rnn rno rnr rnu roa rob rod rol ron roo ror rou rra rrb rrd rrl rrn rrr rru rua rub rud run ruo rur ruu ua- uaa uab uad ual uan uao uar uau uba ubb ubl ubn ubo ubr ubu uda udb udd udl udn udo udr udu ula ulb uld ull uln ulo ulr ulu un- una unb und unl unn uno unr unu uoa uob uod uol uon uoo uor ur- ura urb urd url urn uro urr uru uua uun uur uuu