-er -ol b-p bbb bbe bbi bbk bbl bbo bbp bbr be- beb bee bei bek bel beo bep ber bi- bib bie bii bik bil bio bip bir bkb bke bkk bkl bko bkp bkr blb ble bli blk bll blo blp blr bob boe boi bok bol boo bop bor bpb bpe bpi bpl bpo bpp bpr brb bre bri brk brl bro brp brr ebb ebe ebi ebk ebl ebo ebp ebr eeb eee eek eel eeo eep eer eib eie eii eik eil eio eip eir ekb eke eki ekl eko ekp ekr elb ele eli elk ell elo elp elr eo- eob eoe eoi eok eol eoo eop eor ep- epb epe epi epl epo epp epr erb ere eri erk erl ero erp err ibb ibe ibi ibk ibl ibo ibp ibr ie- iee iei iek iel iep ier iib iie iii iil iio iip iir ikb ike iki ikk ikl iko ikr il- ilb ile ili ilk ill ilo ilp ilr io- iob ioe ioi iol ioo iop ior ipb ipe ipi ipl ipo ipp ipr ir- irb ire iri irk irl iro irp irr kbb kbe kbi kbk kbl kbo kbp kbr ke- keb kee kei kek kel keo kep ker kib kie kii kik kil kio kip kir kkb kke kki kkk kkl kkp kkr kl- klb kli klo klr kob koe koi kok kol koo kop kor kpe kpi kpk kpl kpo kpp kpr kri krk krl kro krp krr l-p lbb lbe lbi lbk lbl lbo lbp lbr leb lee lei lek lel leo lep ler lib lie lii lik lil lio lip lir lkb lkl lkp lkr llb lle lli llk lll llo llp llr lob loe loi lok lol loo lop lor lpb lpe lpi lpk lpl lpo lpp lpr lrb lri lrk lro lrp lrr o-i ob- obb obe obi obk obl obo obp obr oeb oee oei oel oeo oep oer oib oie oii oik oil oio oip oir okb oke oki okk okl oko okp okr olb ole oli olk oll olo olp oo- oob ooi ook ool ooo oop oor op- opb ope opi opk opl opo opp opr or- orb ore ori ork orl oro orp orr p-p pbb pbe pbi pbk pbl pbo pbp pbr peb pee pei pek pel peo pep per pib pie pii pik pil pio pip pir pkb pke pki pkl pko pkp pkr plb ple pli plk pll plo plp plr pob poe poi pok pol poo pop por ppb ppe ppi ppk ppl ppo ppp ppr prb pre pri prk prl pro prp prr rbb rbe rbi rbk rbl rbo rbp rbr re- reb ree rei rek rel reo rep rer rib rie rii rik ril rio rip rir rkb rke rkk rko rkp rle rli rll rlo rlp rlr rob roe roi rok rol roo rop ror rpb rpe rpi rpk rpl rpo rpp rpr rrb rri rrk rrl rrp rrr