-er b-u bbb bbe bbf bbi bbl bbn bbr bbu bbx be- beb bee bef bei bel ben ber beu bex bfb bfe bff bfi bfl bfn bfr bfu bfx bi- bib bie bif bii bil bin bir biu bix blb ble blf bli bll bln blr blu blx bnb bne bnf bni bnl bnn bnr bnu bnx brb bre brf bri brl brn brr bru brx bub bue buf bui bul bun bur buu bux bxb bxi bxl bxn bxx ebb ebe ebf ebi ebl ebn ebr ebu ebx eeb eee eef eel een eer eex ef- efb efe eff efi efl efr efx eib eie eif eii eil ein eir eiu eix elb ele elf eli ell eln elr elu elx en- enb ene enf eni enl enn enr enu erb ere erf eri erl ern err eru eu- eub eue euf eui eul eun eur eux ex- exe exi exl exr exu exx fbb fbe fbf fbi fbl fbn fbr fbu fbx feb fee fef fei fel fen fer feu fex ffe fff ffi ffl ffn ffr ffu ffx fib fie fif fii fil fin fir fiu fix flb fle flf fli fll fln flr flu flx fnb fne fnf fni fnl fnn fnr fnu fnx frb fre frf fri frl frn frr fru fub fue fuf fui ful fun fur fuu fux fxe fxi fxr fxu fxx i-f ibb ibe ibf ibi ibl ibn ibr ibu ibx ie- iee ief iei iel ien ier iex ifb ife iff ifi ifl ifn ifr ifu ifx iib iie iif iii iil iin iir iiu iix il- ilb ile ilf ili ill iln ilr ilu ilx in- inb ine inf ini inl inn inr inu inx ir- irb ire irf iri irl irn irr iru irx iu- iub iue iui iur ixe ixi ixl ixn lbb lbe lbf lbi lbl lbr lbu lbx leb lee lef lei lel len ler leu lex lfb lfe lff lfi lfl lfn lfr lfu lfx lib lie lif lii lil lin lir liu lix llb lle llf lli lll lln llr llu lnb lne lni lnl lnn lnr lnu lrb lrf lri lrn lrr lru lub lue luf lui lul lun lur luu lux lxi lxr lxx n-i nbb nbe nbf nbi nbl nbn nbr nbu nbx ne- neb nee nef nei nel nen ner neu nex nfb nfe nff nfi nfl nfn nfr nfu nib nie nif nii nil nin nir niu nix nlb nle nlf nli nll nln nlr nlu nlx nnb nne nnf nni nnl nnn nnu nrb nre nrf nri nrl nrn nrr nru nrx nub nue nui nul nun nur nuu nux nxl rbb rbe rbf rbi rbl rbn rbr rbu rbx re- reb ree ref rei rel ren rer reu rex rfb rfe rff rfi rfl rfn rfr rfu rib rie rif rii ril rin rir rix rle rlf rli rll rln rlr rlu rnb rni rnn rnr rnu rrb rrf rri rrl rrn rrr rru rub rue ruf rui run rur ruu rux rxr ubb ube ubf ubi ubl ubn ubr ubu ubx ueb uee uef uei uel uen uer ufe uff ufi ufl ufn ufr ufu ufx uib uie uif uii uil uin uir uiu ulb ule ulf uli ull uln ulr ulu un- unb une unf uni unl unn unr unu unx ur- urb ure urf uri url urn urr uru urx uue uun uur uuu uxb uxf uxr uxu xbe xbl xbr xbx xee xel xen xer xeu xex xfe xfl xfn xfx xie xii xin xiu xix xlb xlf xli xlr xnu xrf xrx xue xui xul xun xxi xxl xxx