b-u bbb bbc bbd bbe bbn bbu bcb bcc bcd bce bcn bcu bdb bdc bdd bde bdu be- beb bec bed bee ben beu bnb bnc bnd bne bnn bnu bub buc bud bue bun buu c-- cbb cbc cbd cbe cbn cbu ccb ccc ccd cce ccn ccu cdb cdc cdd cde cdn cdu ce- ceb cec ced cee cen ceu cn- cnb cnc cnd cne cnn cnu cub cuc cud cue cun cuu dbb dbc dbd dbe dbn dbu dcb dcc dcd dce dcn dcu ddb ddc ddd dde ddn ddu de- deb dec ded dee den deu dnb dnc dnd dne dnn dub duc dud due dun ebb ebc ebd ebe ebn ebu ec- ecb ecc ecd ece ecn ecu ed- edb edc edd ede edn edu eeb eec eed eee een en- enb enc end ene enn enu eu- eub euc eud eue eun nbb nbc nbd nbe nbn nbu ncb ncc ncd nce ncn ncu ndb ndc ndd nde ndn ndu ne- neb nec ned nee nen neu nnb nnc nne nnn nnu nub nuc nud nue nun nuu ubb ubc ube ubn ubu ucb ucc ucd uce ucn ucu udb udc udd ude udn udu ueb uec ued uee uen un- unb unc und une unn unu uuc uue uun uuu