-al -ol a-a a-b aaa aab aad aal aan aao aap ab- aba abb abd abl abn abo abp ad- ada adb add adl adn ado adp al- ala alb ald all aln alo alp an- ana anb and anl ann ano anp aoa aob aod aol aon aoo aop ap- apa apb apd apl apn apo app b-p baa bab bad bal ban bao bap bba bbb bbd bbl bbn bbo bbp bda bdb bdd bdl bdo bdp bla blb bld bll bln blo blp bna bnb bnd bnl bnn bno bnp boa bob bod bol bon boo bop bpa bpb bpd bpl bpn bpo bpp daa dab dad dal dan dao dap dba dbb dbd dbl dbn dbo dbp dda ddb ddd ddl ddn ddo ddp dl- dla dlb dld dll dlo dlp dna dnb dnd dnl dnn dno dnp doa dob dod dol don doo dop dpa dpb dpd dpl dpn dpo dpp l-p la- laa lab lad lal lan lao lap lba lbb lbd lbl lbo lbp lda ldb ldd ldl ldn ldo ldp lla llb lld lll lln llo llp lna lnb lnd lnl lnn lno lnp loa lob lod lol lon loo lop lpa lpb lpd lpl lpn lpo lpp naa nab nad nal nan nao nap nba nbb nbd nbl nbn nbo nbp nda ndb ndd ndl ndn ndo ndp nla nlb nld nll nln nlo nlp nna nnb nnl nnn nno nnp no- noa nob nod nol non noo nop npa npb npd npl npn npo npp oaa oab oad oal oan oao oap ob- oba obb obd obl obn obo obp oda odb odd odl odn odo odp ola olb old oll oln olo olp on- ona onb ond onl onn ono onp oo- ooa oob ood ool oon ooo oop op- opa opb opd opl opn opo opp p-p paa pab pad pal pan pao pap pba pbb pbd pbl pbn pbo pbp pda pdb pdd pdl pdn pdo pdp pla plb pld pll pln plo plp pn- pna pnb pnd pnl pnn pno pnp poa pob pod pol pon poo pop ppa ppb ppd ppl ppn ppo ppp