-er -ol bbb bbe bbf bbi bbk bbl bbn bbo bbr be- beb bee bef bei bek bel ben beo ber bfb bfe bff bfi bfl bfn bfo bfr bi- bib bie bif bii bik bil bin bio bir bkb bke bkf bkk bkl bkn bko bkr blb ble blf bli blk bll bln blo blr bnb bne bnf bni bnk bnl bnn bno bnr bob boe bof boi bok bol bon boo bor brb bre brf bri brk brl brn bro brr ebb ebe ebf ebi ebk ebl ebn ebo ebr eeb eee eef eek eel een eeo eer ef- efb efe eff efi efl efo efr eib eie eif eii eik eil ein eio eir ekb eke ekf eki ekl eko ekr elb ele elf eli elk ell eln elo elr en- enb ene enf eni enk enl enn eno enr eo- eob eoe eof eoi eok eol eon eoo eor erb ere erf eri erk erl ern ero err fbb fbe fbf fbi fbk fbl fbn fbo fbr feb fee fef fei fek fel fen feo fer ffe fff ffi ffk ffl ffn ffo ffr fib fie fif fii fik fil fin fir fkb fkf fki fkk fkl flb fle flf fli fll fln flo flr fnb fne fnf fni fnk fnl fnn fnr fob foe fof foi fok fol fon foo for frb fre frf fri frk frl frn fro frr i-f ibb ibe ibf ibi ibk ibl ibn ibo ibr ie- iee ief iei iek iel ien ier ifb ife iff ifi ifl ifn ifo ifr iib iie iif iii iil iin iio iir ikb ike ikf iki ikk ikl iko ikr il- ilb ile ilf ili ilk ill iln ilo ilr in- inb ine inf ini ink inl inn ino inr io- iob ioe iof ioi iol ion ioo ior ir- irb ire irf iri irk irl irn iro irr kbb kbe kbf kbi kbk kbl kbn kbo kbr ke- keb kee kef kei kek kel ken keo ker kff kfi kfo kib kie kif kii kik kil kin kio kir kkb kke kki kkk kkl kkn kkr kl- klb klf kli klo klr kn- kne knf kni knk knl knn kno knr kob koe kof koi kok kol kon koo kor krf kri krk krl krn kro krr lbb lbe lbf lbi lbk lbl lbo lbr leb lee lef lei lek lel len leo ler lfb lfe lff lfi lfk lfl lfn lfo lfr lib lie lif lii lik lil lin lio lir lkb lkl lkr llb lle llf lli llk lll lln llo llr lnb lne lni lnk lnl lnn lno lnr lob loe lof loi lok lol lon loo lor lrb lrf lri lrk lrn lro lrr n-i nbb nbe nbf nbi nbk nbl nbn nbo nbr ne- neb nee nef nei nek nel nen neo ner nfb nfe nff nfi nfk nfl nfn nfo nfr nib nie nif nii nik nil nin nio nir nke nkf nki nkk nkn nko nkr nlb nle nlf nli nlk nll nln nlo nlr nnb nne nnf nni nnk nnl nnn nno no- nob noe nof noi nok nol non noo nor nrb nre nrf nri nrk nrl nrn nro nrr o-i ob- obb obe obf obi obk obl obn obo obr oeb oee oef oei oel oen oeo oer of- ofb ofe off ofi ofl ofn ofo ofr oib oie oif oii oik oil oin oio oir okb oke oki okk okl oko okr olb ole olf oli olk oll oln olo on- onb one onf oni onk onl onn ono onr oo- oob oof ooi ook ool oon ooo oor or- orb ore orf ori ork orl orn oro orr rbb rbe rbf rbi rbk rbl rbn rbo rbr re- reb ree ref rei rek rel ren reo rer rfb rfe rff rfi rfk rfl rfn rfo rfr rib rie rif rii rik ril rin rio rir rkb rke rkf rkk rko rle rlf rli rll rln rlo rlr rnb rni rnn rno rnr rob roe rof roi rok rol ron roo ror rrb rrf rri rrk rrl rrn rrr