b-u bbb bbe bbk bbo bbu bbx be- beb bee bek beo beu bex bjj bjk bju bkb bke bkk bko bkx bob boe boj bok boo bou box bub bue buj buk buo buu bux bxb bxj bxo bxx ebb ebe ebj ebk ebo ebu ebx eeb eee eek eeo eex ejo eju ekb eke eko eku eo- eob eoe eok eoo eou eu- eub eue euj eux ex- exe exo exu exx jbj jbk jbo jbu jeb jee jej jek jeo jeu jjb jjj jjk jju jkb jkk jko jku jkx job joe joj jok joo jou jub jue juk juo kbb kbe kbk kbo kbu kbx ke- keb kee kek keo kex kjb kje kju kkb kke kkk kku kob koe kok koo kou kub kue kuj kuk kuu kxo ob- obb obe obj obk obo obu obx oeb oee oeo oex ojb oje ojo oju okb oke okj okk oko oku oo- oob ook ooo oox ou- oue ouk ouo ox- oxb oxo oxx ubb ube ubk ubo ubu ubx ueb uee ujo ukb uke ukk uku uob uoe uoj uok uoo uox uue uuu uxb uxo uxu xbe xbx xee xeu xex xjo xkb xke xok xoo xox xue xxo xxx