-al -ol a-a a-b aaa aab aad aal aao aap aar ab- aba abb abd abl abo abp abr ad- ada adb add adl ado adp adr al- ala alb ald all alo alp alr aoa aob aod aol aoo aop aor ap- apa apb apd apl apo app apr ar- ara arb ard arl aro arp arr b-p baa bab bad bal bao bap bar bba bbb bbd bbl bbo bbp bbr bda bdb bdd bdl bdo bdp bdr bla blb bld bll blo blp blr boa bob bod bol boo bop bor bpa bpb bpd bpl bpo bpp bpr bra brb brd brl bro brp brr daa dab dad dal dao dap dar dba dbb dbd dbl dbo dbp dbr dda ddb ddd ddl ddo ddp ddr dl- dla dlb dld dll dlo dlp dlr doa dob dod dol doo dop dor dpa dpb dpd dpl dpo dpp dpr dra drb drd drl dro drp drr l-p la- laa lab lad lal lao lap lar lba lbb lbd lbl lbo lbp lbr lda ldb ldd ldl ldo ldp ldr lla llb lld lll llo llp llr loa lob lod lol loo lop lor lpa lpb lpd lpl lpo lpp lpr lra lrb lrd lro lrp lrr oaa oab oad oal oao oap oar ob- oba obb obd obl obo obp obr oda odb odd odl odo odp odr ola olb old oll olo olp oo- ooa oob ood ool ooo oop oor op- opa opb opd opl opo opp opr or- ora orb ord orl oro orp orr p-p paa pab pad pal pao pap par pba pbb pbd pbl pbo pbp pbr pda pdb pdd pdl pdo pdp pdr pla plb pld pll plo plp plr poa pob pod pol poo pop por ppa ppb ppd ppl ppo ppp ppr pra prb prd prl pro prp prr ra- raa rab rad ral rao rap rar rba rbb rbd rbl rbo rbp rbr rda rdb rdd rdl rdo rdp rdr rla rld rll rlo rlp rlr roa rob rod rol roo rop ror rpa rpb rpd rpl rpo rpp rpr rra rrb rrd rrl rrp rrr