b-u bbb bbc bbe bbu bbx bcb bcc bce bcu bcx be- beb bec bee beu bex bub buc bue buu bux bxb bxx c-- cbb cbc cbe cbu cbx ccb ccc cce ccu ccx ce- ceb cec cee ceu cex cub cuc cue cuu cxc cxx ebb ebc ebe ebu ebx ec- ecb ecc ece ecu ecx eeb eec eee eex eu- eub euc eue eux ex- exc exe exu exx ubb ubc ube ubu ubx ucb ucc uce ucu ueb uec uee uuc uue uuu uxb uxc uxu xbc xbe xbx xcb xcx xee xeu xex xue xxx