b-u bbb bbe bbf bbi bbl bbn bbs bbu bbx be- beb bee bef bei bel ben bes beu bex bfb bfe bff bfi bfl bfn bfs bfu bfx bi- bib bie bif bii bil bin bis biu bix blb ble blf bli bll bln bls blu blx bnb bne bnf bni bnl bnn bns bnu bnx bsb bse bsf bsi bsl bsn bss bsu bsx bub bue buf bui bul bun bus buu bux bxb bxi bxl bxn bxx ebb ebe ebf ebi ebl ebn ebs ebu ebx eeb eee eef eel een ees eex ef- efb efe eff efi efl efs efx eib eie eif eii eil ein eis eiu eix elb ele elf eli ell eln els elu elx en- enb ene enf eni enl enn ens enu es- esb ese esf esi esl esn ess esu esx eu- eub eue euf eui eul eun eus eux ex- exe exi exl exs exu exx fbb fbe fbf fbi fbl fbn fbs fbu fbx feb fee fef fei fel fen fes feu fex ffe fff ffi ffl ffn ffs ffu ffx fib fie fif fii fil fin fis fiu fix flb fle flf fli fll fln fls flu flx fnb fne fnf fni fnl fnn fns fnu fnx fsb fse fsf fsi fsl fsn fss fsu fsx fub fue fuf fui ful fun fus fuu fux fxe fxi fxs fxu fxx i-f ibb ibe ibf ibi ibl ibn ibs ibu ibx ie- iee ief iei iel ien ies iex ifb ife iff ifi ifl ifn ifs ifu ifx iib iie iif iii iil iin iis iiu iix il- ilb ile ilf ili ill iln ils ilu ilx in- inb ine inf ini inl inn ins inu inx is- isb ise isf isi isl isn iss isu iu- iub iue iui ius ixe ixi ixl ixn lbb lbe lbf lbi lbl lbs lbu lbx leb lee lef lei lel len les leu lex lfb lfe lff lfi lfl lfn lfs lfu lfx lib lie lif lii lil lin lis liu lix llb lle llf lli lll lln lls llu lnb lne lni lnl lnn lns lnu lsb lse lsf lsi lsl lsn lss lsu lub lue luf lui lul lun lus luu lux lxi lxx n-i nbb nbe nbf nbi nbl nbn nbs nbu nbx ne- neb nee nef nei nel nen nes neu nex nfb nfe nff nfi nfl nfn nfs nfu nib nie nif nii nil nin nis niu nix nlb nle nlf nli nll nln nls nlu nlx nnb nne nnf nni nnl nnn nns nnu nsb nse nsf nsi nsl nsn nss nsu nsx nub nue nui nul nun nus nuu nux nxl sbb sbe sbf sbi sbl sbn sbs sbu sbx se- seb see sef sei sel sen ses seu sex sfb sfe sff sfi sfl sfn sfs sfu sfx sib sie sif sii sil sin sis siu six slb sle slf sli sll sln sls slu slx snb sne snf sni snl snn sns snu ss- ssb sse ssf ssi ssl ssn sss ssu ssx sub sue suf sui sul sun sus suu sux sxi sxl sxn sxs sxu ubb ube ubf ubi ubl ubn ubs ubu ubx ueb uee uef uei uel uen ues ufe uff ufi ufl ufn ufs ufu ufx uib uie uif uii uil uin uis uiu ulb ule ulf uli ull uln uls ulu un- unb une unf uni unl unn uns unu unx usb use usf usi usl usn uss usu usx uue uun uus uuu uxb uxf uxu xbe xbl xbx xee xel xen xes xeu xex xfe xfl xfn xfs xfx xie xii xin xis xiu xix xlb xlf xli xls xns xnu xsb xsi xsl xss xue xui xul xun xus xxi xxl xxx