b-u bbb bbc bbd bbe bbn bbo bbu bcb bcc bcd bce bcn bco bcu bcz bdb bdc bdd bde bdo bdu bdz be- beb bec bed bee ben beo beu bez bnb bnc bnd bne bnn bno bnu bnz bob boc bod boe bon boo bou boz bub buc bud bue bun buo buu buz bzd bze bzn bzo bzu bzz c-- cbb cbc cbd cbe cbn cbo cbu cbz ccb ccc ccd cce ccn cco ccu ccz cdb cdc cdd cde cdn cdo cdu cdz ce- ceb cec ced cee cen ceo ceu cez cn- cnb cnc cnd cne cnn cno cnu co- cob coc cod coe con coo cou coz cub cuc cud cue cun cuo cuu cuz cz- czc czd cze czo dbb dbc dbd dbe dbn dbo dbu dbz dcb dcc dcd dce dcn dco dcu ddb ddc ddd dde ddn ddo ddu ddz de- deb dec ded dee den deo deu dez dnb dnc dnd dne dnn dno dnz dob doc dod doe don doo dou doz dub duc dud due dun duo duz dzb dzd dze dzo dzu 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 enz eo- eob eoc eod eoe eon eoo eou eu- eub euc eud eue eun eze ezo ezz 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 nez nnb nnc nne nnn nno nnu nnz no- nob noc nod noe non noo nou noz nub nuc nud nue nun nuo nuu nzb nzd nze nzo nzz ob- obb obc obd obe obn obo obu oc- ocb occ ocd ocn oco ocu ocz 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 oze ozo ozu ozz 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 uzb uzo uzu zbb zbc zce zco zeb zec zed zee zen zeo zez znc znd zne znn zno zo- zob zoc zod zoe zon zoo zou zub zuc zud zun zuz zzz