b-u bbb bbc bbd bbe bbl bbu bcb bcc bcd bce bcl bcu bdb bdc bdd bde bdl bdu be- beb bec bed bee bel beu blb blc bld ble bll blu bub buc bud bue bul buu c-- cbb cbc cbd cbe cbl cbu ccb ccc ccd cce ccl ccu cdb cdc cdd cde cdl cdu ce- ceb cec ced cee cel ceu cl- clb clc cld cle cll clu cub cuc cud cue cul cuu dbb dbc dbd dbe dbl dbu dcb dcc dcd dce dcl dcu ddb ddc ddd dde ddl ddu de- deb dec ded dee del deu dl- dlb dlc dld dle dll dlu dub duc dud due dul ebb ebc ebd ebe ebl ebu ec- ecb ecc ecd ece ecl ecu ed- edb edc edd ede edl edu eeb eec eed eee eel elb elc eld ele ell elu eu- eub euc eud eue eul lbb lbc lbd lbe lbl lbu lcb lcc lcd lce lcl lcu ldb ldc ldd lde ldl ldu leb lec led lee lel leu llb llc lld lle lll llu lub luc lud lue lul luu ubb ubc ube ubl ubu ucb ucc ucd uce ucl ucu udb udc udd ude udl udu ueb uec ued uee uel ulb ulc uld ule ull ulu uuc uue uuu