b-u bbb bbc bbd bbe bbn bbo bbu bcb bcc bcd bce bcn bco bcu bdb bdc bdd bde bdo bdu be- beb bec bed bee ben beo beu bnb bnc bnd bne bnn bno bnu bob boc bod boe bon boo bou bub buc bud bue bun buo buu c-- cbb cbc cbd cbe cbn cbo cbu ccb ccc ccd cce ccn cco ccu cdb cdc cdd cde cdn cdo cdu ce- ceb cec ced cee cen ceo ceu cn- cnb cnc cnd cne cnn cno cnu co- cob coc cod coe con coo cou cub cuc cud cue cun cuo cuu dbb dbc dbd dbe dbn dbo dbu dcb dcc dcd dce dcn dco dcu ddb ddc ddd dde ddn ddo ddu de- deb dec ded dee den deo deu dnb dnc dnd dne dnn dno dob doc dod doe don doo dou dub duc dud due dun duo ebb ebc ebd ebe ebn ebo ebu ec- ecb ecc ecd ece ecn eco ecu ed- edb edc edd ede edn edo edu eeb eec eed eee een eeo en- enb enc end ene enn eno enu eo- eob eoc eod eoe eon eoo eou eu- eub euc eud eue eun nbb nbc nbd nbe nbn nbo nbu ncb ncc ncd nce ncn nco ncu ndb ndc ndd nde ndn ndo ndu ne- neb nec ned nee nen neo neu nnb nnc nne nnn nno nnu no- nob noc nod noe non noo nou nub nuc nud nue nun nuo nuu ob- obb obc obd obe obn obo obu oc- ocb occ ocd ocn oco ocu odb odc odd ode odn odo odu oeb oec oed oee oen oeo on- onb onc ond one onn ono onu oo- oob ooc ood oon ooo ou- ouc oud oue oun ouo ubb ubc ube ubn ubo ubu ucb ucc ucd uce ucn uco ucu udb udc udd ude udn udo udu ueb uec ued uee uen un- unb unc und une unn uno unu uob uoc uod uoe uon uoo uuc uue uun uuu