-er -ol b-u bbb bbe bbf bbl bbn bbo bbr bbu be- beb bee bef bel ben beo ber beu bez bfb bfe bff bfl bfn bfo bfr bfu bfz blb ble blf bll bln blo blr blu blz bnb bne bnf bnl bnn bno bnr bnu bnz bob boe bof bol bon boo bor bou boz brb bre brf brl brn bro brr bru brz bub bue buf bul bun buo bur buu buz bze bzf bzn bzo bzr bzu bzz ebb ebe ebf ebl ebn ebo ebr ebu eeb eee eef eel een eeo eer ef- efb efe eff efl efo efr elb ele elf ell eln elo elr elu elz en- enb ene enf enl enn eno enr enu enz eo- eob eoe eof eol eon eoo eor eou erb ere erf erl ern ero err eru erz eu- eub eue euf eul eun eur eze ezf ezo ezr ezz fbb fbe fbf fbl fbn fbo fbr fbu feb fee fef fel fen feo fer feu fez ffe fff ffl ffn ffo ffr ffu ffz flb fle flf fll fln flo flr flu fnb fne fnf fnl fnn fnr fnu fnz fob foe fof fol fon foo for fou foz frb fre frf frl frn fro frr fru fub fue fuf ful fun fuo fur fuu lbb lbe lbf lbl lbo lbr lbu leb lee lef lel len leo ler leu lez lfb lfe lff lfl lfn lfo lfr lfu llb lle llf lll lln llo llr llu llz lnb lne lnl lnn lno lnr lnu lob loe lof lol lon loo lor lou loz lrb lrf lrn lro lrr lru lrz lub lue luf lul lun luo lur luu luz lzo lzr lzu nbb nbe nbf nbl nbn nbo nbr nbu ne- neb nee nef nel nen neo ner neu nez nfb nfe nff nfl nfn nfo nfr nfu nlb nle nlf nll nln nlo nlr nlu nlz nnb nne nnf nnl nnn nno nnu nnz no- nob noe nof nol non noo nor nou noz nrb nre nrf nrl nrn nro nrr nru nrz nub nue nul nun nuo nur nuu nzb nze nzf nzo nzz ob- obb obe obf obl obn obo obr obu oeb oee oef oel oen oeo oer of- ofb ofe off ofl ofn ofo ofr ofu ofz olb ole olf oll oln olo olu on- onb one onf onl onn ono onr onu oo- oob oof ool oon ooo oor or- orb ore orf orl orn oro orr oru orz ou- oue ouf oul oun ouo our oze ozo ozu ozz rbb rbe rbf rbl rbn rbo rbr rbu re- reb ree ref rel ren reo rer reu rez rfb rfe rff rfl rfn rfo rfr rfu rfz rle rlf rll rln rlo rlr rlu rnb rnn rno rnr rnu rnz rob roe rof rol ron roo ror rou roz rrb rrf rrl rrn rrr rru rub rue ruf run ruo rur ruu ruz rzb rze rzo ubb ube ubf ubl ubn ubo ubr ubu ueb uee uef uel uen uer ufe uff ufl ufn ufo ufr ufu ulb ule ulf ull uln ulo ulr ulu un- unb une unf unl unn uno unr unu uob uoe uol uon uoo uor ur- urb ure urf url urn uro urr uru urz uue uun uur uuu uzb uzo uzu 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 zou zrl zro zub zul zun zur zuz zzr zzz