b-u bbb bbd bbe bbk bbl bbu bdb bdd bde bdk bdl bdu be- beb bed bee bek bel beu bkb bke bkk bkl blb bld ble blk bll blu bub bud bue buk bul buu dbb dbd dbe dbk dbl dbu ddb ddd dde ddk ddl ddu de- deb ded dee dek del deu dkb dke dkk dkl dku dl- dlb dld dle dlk dll dlu dub dud due duk dul ebb ebd ebe ebk ebl ebu ed- edb edd ede edk edl edu eeb eed eee eek eel ekb ekd eke ekl eku elb eld ele elk ell elu eu- eub eud eue eul kbb kbd kbe kbk kbl kbu kdb kde kdk kdl kdu ke- keb ked kee kek kel kkb kke kkk kkl kku kl- klb kld klu kub kud kue kuk kul kuu lbb lbd lbe lbk lbl lbu ldb ldd lde ldk ldl ldu leb led lee lek lel leu lkb lkl llb lld lle llk lll llu lub lud lue luk lul luu ubb ube ubk ubl ubu udb udd ude udk udl udu ueb ued uee uel ukb uke ukk ukl uku ulb uld ule ulk ull ulu uue uuu