b-u bbb bbe bbf bbi bbk bbl bbu be- beb bee bef bei bek bel beu bfb bfe bff bfi bfl bfu bi- bib bie bif bii bik bil biu bkb bke bkf bkk bkl blb ble blf bli blk bll blu bub bue buf bui buk bul buu ebb ebe ebf ebi ebk ebl ebu eeb eee eef eek eel ef- efb efe eff efi efl eib eie eif eii eik eil eiu ekb eke ekf eki ekl eku elb ele elf eli elk ell elu eu- eub eue euf eui eul fbb fbe fbf fbi fbk fbl fbu feb fee fef fei fek fel feu ffe fff ffi ffk ffl ffu fib fie fif fii fik fil fiu fkb fkf fki fkk fkl flb fle flf fli fll flu fub fue fuf fui fuk ful fuu i-f ibb ibe ibf ibi ibk ibl ibu ie- iee ief iei iek iel ifb ife iff ifi ifl ifu iib iie iif iii iil iiu ikb ike ikf iki ikk ikl iku il- ilb ile ilf ili ilk ill ilu iu- iub iue iui kbb kbe kbf kbi kbk kbl kbu ke- keb kee kef kei kek kel kff kfi kfu kib kie kif kii kik kil kiu kkb kke kki kkk kkl kku kl- klb klf kli klu kub kue kui kuk kul kuu lbb lbe lbf lbi lbk lbl lbu leb lee lef lei lek lel leu lfb lfe lff lfi lfk lfl lfu lib lie lif lii lik lil liu lkb lkl llb lle llf lli llk lll llu lub lue luf lui luk lul luu ubb ube ubf ubi ubk ubl ubu ueb uee uef uei uel ufe uff ufi ufl ufu uib uie uif uii uil uiu ukb uke ukf uki ukk ukl uku ulb ule ulf uli ulk ull ulu uue uuu