b-u bbb bbc bbd bbe bbu bcb bcc bcd bce bcu bdb bdc bdd bde bdu be- beb bec bed bee beu bub buc bud bue buu c-- cbb cbc cbd cbe cbu ccb ccc ccd cce ccu cdb cdc cdd cde cdu ce- ceb cec ced cee ceu cub cuc cud cue cuu dbb dbc dbd dbe dbu dcb dcc dcd dce dcu ddb ddc ddd dde ddu de- deb dec ded dee deu dub duc dud due ebb ebc ebd ebe ebu ec- ecb ecc ecd ece ecu ed- edb edc edd ede edu eeb eec eed eee eu- eub euc eud eue ubb ubc ube ubu ucb ucc ucd uce ucu udb udc udd ude udu ueb uec ued uee uuc uue uuu