-al -ol a-a a-b aaa aab aad aal aao aap ab- aba abb abd abl abo abp ad- ada adb add adl ado adp al- ala alb ald all alo alp aoa aob aod aol aoo aop ap- apa apb apd apl apo app b-p baa bab bad bal bao bap bba bbb bbd bbl bbo bbp bda bdb bdd bdl bdo bdp bla blb bld bll blo blp boa bob bod bol boo bop bpa bpb bpd bpl bpo bpp daa dab dad dal dao dap dba dbb dbd dbl dbo dbp dda ddb ddd ddl ddo ddp dl- dla dlb dld dll dlo dlp doa dob dod dol doo dop dpa dpb dpd dpl dpo dpp l-p la- laa lab lad lal lao lap lba lbb lbd lbl lbo lbp lda ldb ldd ldl ldo ldp lla llb lld lll llo llp loa lob lod lol loo lop lpa lpb lpd lpl lpo lpp oaa oab oad oal oao oap ob- oba obb obd obl obo obp oda odb odd odl odo odp ola olb old oll olo olp oo- ooa oob ood ool ooo oop op- opa opb opd opl opo opp p-p paa pab pad pal pao pap pba pbb pbd pbl pbo pbp pda pdb pdd pdl pdo pdp pla plb pld pll plo plp poa pob pod pol poo pop ppa ppb ppd ppl ppo ppp