-al -ol a-a a-b aaa aab aad aal aan aao aap aar ab- aba abb abd abl abn abo abp abr ad- ada adb add adl adn ado adp adr al- ala alb ald all aln alo alp alr an- ana anb and anl ann ano anp anr aoa aob aod aol aon aoo aop aor ap- apa apb apd apl apn apo app apr ar- ara arb ard arl arn aro arp arr b-p baa bab bad bal ban bao bap bar bba bbb bbd bbl bbn bbo bbp bbr bda bdb bdd bdl bdo bdp bdr bla blb bld bll bln blo blp blr bna bnb bnd bnl bnn bno bnp bnr boa bob bod bol bon boo bop bor bpa bpb bpd bpl bpn bpo bpp bpr bra brb brd brl brn bro brp brr daa dab dad dal dan dao dap dar dba dbb dbd dbl dbn dbo dbp dbr dda ddb ddd ddl ddn ddo ddp ddr dl- dla dlb dld dll dlo dlp dlr dna dnb dnd dnl dnn dno dnp dnr doa dob dod dol don doo dop dor dpa dpb dpd dpl dpn dpo dpp dpr dra drb drd drl drn dro drp drr l-p la- laa lab lad lal lan lao lap lar lba lbb lbd lbl lbo lbp lbr lda ldb ldd ldl ldn ldo ldp ldr lla llb lld lll lln llo llp llr lna lnb lnd lnl lnn lno lnp lnr loa lob lod lol lon loo lop lor lpa lpb lpd lpl lpn lpo lpp lpr lra lrb lrd lrn lro lrp lrr naa nab nad nal nan nao nap nar nba nbb nbd nbl nbn nbo nbp nbr nda ndb ndd ndl ndn ndo ndp ndr nla nlb nld nll nln nlo nlp nlr nna nnb nnl nnn nno nnp no- noa nob nod nol non noo nop nor npa npb npd npl npn npo npp npr nra nrb nrd nrl nrn nro nrp nrr oaa oab oad oal oan oao oap oar ob- oba obb obd obl obn obo obp obr oda odb odd odl odn odo odp odr ola olb old oll oln olo olp on- ona onb ond onl onn ono onp onr oo- ooa oob ood ool oon ooo oop oor op- opa opb opd opl opn opo opp opr or- ora orb ord orl orn oro orp orr p-p paa pab pad pal pan pao pap par pba pbb pbd pbl pbn pbo pbp pbr pda pdb pdd pdl pdn pdo pdp pdr pla plb pld pll pln plo plp plr pn- pna pnb pnd pnl pnn pno pnp pnr poa pob pod pol pon poo pop por ppa ppb ppd ppl ppn ppo ppp ppr pra prb prd prl prn pro prp prr ra- raa rab rad ral ran rao rap rar rba rbb rbd rbl rbn rbo rbp rbr rda rdb rdd rdl rdn rdo rdp rdr rla rld rll rln rlo rlp rlr rna rnb rnd rnn rno rnp rnr roa rob rod rol ron roo rop ror rpa rpb rpd rpl rpn rpo rpp rpr rra rrb rrd rrl rrn rrp rrr