-er -ol bbb bbe bbf bbl bbn bbo bbr be- beb bee bef bel ben beo ber bez bfb bfe bff bfl bfn bfo bfr bfz blb ble blf bll bln blo blr blz bnb bne bnf bnl bnn bno bnr bnz bob boe bof bol bon boo bor boz brb bre brf brl brn bro brr brz bze bzf bzn bzo bzr bzz ebb ebe ebf ebl ebn ebo ebr eeb eee eef eel een eeo eer ef- efb efe eff efl efo efr elb ele elf ell eln elo elr elz en- enb ene enf enl enn eno enr enz eo- eob eoe eof eol eon eoo eor erb ere erf erl ern ero err erz eze ezf ezo ezr ezz fbb fbe fbf fbl fbn fbo fbr feb fee fef fel fen feo fer fez ffe fff ffl ffn ffo ffr ffz flb fle flf fll fln flo flr fnb fne fnf fnl fnn fnr fnz fob foe fof fol fon foo for foz frb fre frf frl frn fro frr lbb lbe lbf lbl lbo lbr leb lee lef lel len leo ler lez lfb lfe lff lfl lfn lfo lfr llb lle llf lll lln llo llr llz lnb lne lnl lnn lno lnr lob loe lof lol lon loo lor loz lrb lrf lrn lro lrr lrz lzo lzr nbb nbe nbf nbl nbn nbo nbr ne- neb nee nef nel nen neo ner nez nfb nfe nff nfl nfn nfo nfr nlb nle nlf nll nln nlo nlr nlz nnb nne nnf nnl nnn nno nnz no- nob noe nof nol non noo nor noz nrb nre nrf nrl nrn nro nrr nrz nzb nze nzf nzo nzz ob- obb obe obf obl obn obo obr oeb oee oef oel oen oeo oer of- ofb ofe off ofl ofn ofo ofr ofz olb ole olf oll oln olo on- onb one onf onl onn ono onr oo- oob oof ool oon ooo oor or- orb ore orf orl orn oro orr orz oze ozo ozz rbb rbe rbf rbl rbn rbo rbr re- reb ree ref rel ren reo rer rez rfb rfe rff rfl rfn rfo rfr rfz rle rlf rll rln rlo rlr rnb rnn rno rnr rnz rob roe rof rol ron roo ror roz rrb rrf rrl rrn rrr rzb rze rzo zbb zbl zbr zeb zee zef zel zen zeo zer zez zfn zfr zlr zne znn zno zo- zob zoe zof zol zon zoo zor zrl zro zzr zzz