b-u bbb bbe bbk bbl bbu be- beb bee bek bel beu bkb bke bkk bkl blb ble blk bll blu bub bue buk bul buu ebb ebe ebk ebl ebu eeb eee eek eel ekb eke ekl eku elb ele elk ell elu eu- eub eue eul kbb kbe kbk kbl kbu ke- keb kee kek kel kkb kke kkk kkl kku kl- klb klu kub kue kuk kul kuu lbb lbe lbk lbl lbu leb lee lek lel leu lkb lkl llb lle llk lll llu lub lue luk lul luu ubb ube ubk ubl ubu ueb uee uel ukb uke ukk ukl uku ulb ule ulk ull ulu uue uuu