-er -ol b-p bbb bbe bbl bbn bbo bbp bbr be- beb bee bel ben beo bep ber blb ble bll bln blo blp blr bnb bne bnl bnn bno bnp bnr bob boe bol bon boo bop bor bpb bpe bpl bpn bpo bpp bpr brb bre brl brn bro brp brr ebb ebe ebl ebn ebo ebp ebr eeb eee eel een eeo eep eer elb ele ell eln elo elp elr en- enb ene enl enn eno enp enr eo- eob eoe eol eon eoo eop eor ep- epb epe epl epn epo epp epr erb ere erl ern ero erp err l-p lbb lbe lbl lbo lbp lbr leb lee lel len leo lep ler llb lle lll lln llo llp llr lnb lne lnl lnn lno lnp lnr lob loe lol lon loo lop lor lpb lpe lpl lpn lpo lpp lpr lrb lrn lro lrp lrr nbb nbe nbl nbn nbo nbp nbr ne- neb nee nel nen neo nep ner nlb nle nll nln nlo nlp nlr nnb nne nnl nnn nno nnp no- nob noe nol non noo nop nor npb npe npl npn npo npp npr nrb nre nrl nrn nro nrp nrr ob- obb obe obl obn obo obp obr oeb oee oel oen oeo oep oer olb ole oll oln olo olp on- onb one onl onn ono onp onr oo- oob ool oon ooo oop oor op- opb ope opl opn opo opp opr or- orb ore orl orn oro orp orr p-p pbb pbe pbl pbn pbo pbp pbr peb pee pel pen peo pep per plb ple pll pln plo plp plr pn- pnb pne pnl pnn pno pnp pnr pob poe pol pon poo pop por ppb ppe ppl ppn ppo ppp ppr prb pre prl prn pro prp prr rbb rbe rbl rbn rbo rbp rbr re- reb ree rel ren reo rep rer rle rll rln rlo rlp rlr rnb rnn rno rnp rnr rob roe rol ron roo rop ror rpb rpe rpl rpn rpo rpp rpr rrb rrl rrn rrp rrr