-er -ol b-p bbb bbd bbe bbk bbl bbo bbp bbr bdb bdd bde bdk bdl bdo bdp bdr be- beb bed bee bek bel beo bep ber bkb bke bkk bkl bko bkp bkr blb bld ble blk bll blo blp blr bob bod boe bok bol boo bop bor bpb bpd bpe bpl bpo bpp bpr brb brd bre brk brl bro brp brr dbb dbd dbe dbk dbl dbo dbp dbr ddb ddd dde ddk ddl ddo ddp ddr de- deb ded dee dek del deo dep der dkb dke dkk dkl dko dkp dkr dl- dlb dld dle dlk dll dlo dlp dlr dob dod doe dok dol doo dop dor dpb dpd dpe dpk dpl dpo dpp dpr drb drd dre drk drl dro drp drr ebb ebd ebe ebk ebl ebo ebp ebr ed- edb edd ede edk edl edo edp edr eeb eed eee eek eel eeo eep eer ekb ekd eke ekl eko ekp ekr elb eld ele elk ell elo elp elr eo- eob eod eoe eok eol eoo eop eor ep- epb epd epe epl epo epp epr erb erd ere erk erl ero erp err kbb kbd kbe kbk kbl kbo kbp kbr kdb kde kdk kdl kdo kdp kdr ke- keb ked kee kek kel keo kep ker kkb kke kkk kkl kkp kkr kl- klb kld klo klr kob kod koe kok kol koo kop kor kpd kpe kpk kpl kpo kpp kpr krd krk krl kro krp krr l-p lbb lbd lbe lbk lbl lbo lbp lbr ldb ldd lde ldk ldl ldo ldp ldr leb led lee lek lel leo lep ler lkb lkl lkp lkr llb lld lle llk lll llo llp llr lob lod loe lok lol loo lop lor lpb lpd lpe lpk lpl lpo lpp lpr lrb lrd lrk lro lrp lrr ob- obb obd obe obk obl obo obp obr odb odd ode odl odo odp odr oeb oed oee oel oeo oep oer okb okd oke okk okl oko okp okr olb old ole olk oll olo olp oo- oob ood ook ool ooo oop oor op- opb opd ope opk opl opo opp opr or- orb ord ore ork orl oro orp orr p-p pbb pbd pbe pbk pbl pbo pbp pbr pdb pdd pde pdk pdl pdo pdp pdr peb ped pee pek pel peo pep per pkb pkd pke pkl pko pkp pkr plb pld ple plk pll plo plp plr pob pod poe pok pol poo pop por ppb ppd ppe ppk ppl ppo ppp ppr prb prd pre prk prl pro prp prr rbb rbd rbe rbk rbl rbo rbp rbr rdb rdd rde rdl rdo rdp rdr re- reb red ree rek rel reo rep rer rkb rke rkk rko rkp rld rle rll rlo rlp rlr rob rod roe rok rol roo rop ror rpb rpd rpe rpk rpl rpo rpp rpr rrb rrd rrk rrl rrp rrr