b-u bbb bbc bbd bbe bbm bbn bbu bcb bcc bcd bce bcm bcn bcu bdb bdc bdd bde bdm bdu be- beb bec bed bee bem ben beu bmb bmc bmd bme bmm bmn bmu bnb bnc bnd bne bnn bnu bub buc bud bue bum bun buu c-- cbb cbc cbd cbe cbm cbn cbu ccb ccc ccd cce ccm ccn ccu cdb cdc cdd cde cdm cdn cdu ce- ceb cec ced cee cem cen ceu cmb cmc cmd cme cmm cmn cmu cn- cnb cnc cnd cne cnm cnn cnu cub cuc cud cue cum cun cuu dbb dbc dbd dbe dbm dbn dbu dcb dcc dcd dce dcm dcn dcu ddb ddc ddd dde ddm ddn ddu de- deb dec ded dee dem den deu dmb dmc dmd dme dmm dmn dmu dnb dnc dnd dne dnm dnn dub duc dud due dum dun ebb ebc ebd ebe ebm ebn ebu ec- ecb ecc ecd ece ecm ecn ecu ed- edb edc edd ede edm edn edu eeb eec eed eee eem een em- emb emc emd eme emm emn emu en- enb enc end ene enm enn enu eu- eub euc eud eue eun mbb mbc mbd mbe mbm mbu mc- mcb mcc mcd mce mcm mcn mcu mdb mdc mdd mde mdm mdn mdu meb mec med mee mem men meu mmb mmc mmd mme mmm mmn mmu mnb mnc mne mnm mnn mnu mub muc mud mue mum mun muu nbb nbc nbd nbe nbm nbn nbu ncb ncc ncd nce ncm ncn ncu ndb ndc ndd nde ndm ndn ndu ne- neb nec ned nee nem nen neu nmb nmc nmd nme nmm nmn nmu nnb nnc nne nnm nnn nnu nub nuc nud nue num nun nuu ubb ubc ube ubn ubu ucb ucc ucd uce ucm ucn ucu udb udc udd ude udm udn udu ueb uec ued uee uem uen um- umb umc umd ume umm umn umu un- unb unc und une unm unn unu uuc uue uum uun uuu