b-u bbb bbc bbd bbe bbm bbn bbt bbu bcb bcc bcd bce bcm bcn bct bcu bdb bdc bdd bde bdm bdt bdu be- beb bec bed bee bem ben bet beu bmb bmc bmd bme bmm bmn bmt bmu bnb bnc bnd bne bnn bnt bnu btb btc btd bte btm btn btt btu bub buc bud bue bum bun but buu c-- cbb cbc cbd cbe cbm cbn cbt cbu ccb ccc ccd cce ccm ccn cct ccu cdb cdc cdd cde cdm cdn cdt cdu ce- ceb cec ced cee cem cen cet ceu cmb cmc cmd cme cmm cmn cmt cmu cn- cnb cnc cnd cne cnm cnn cnt cnu ctb ctc ctd cte ctm ctn ctt ctu cub cuc cud cue cum cun cut cuu dbb dbc dbd dbe dbm dbn dbt dbu dcb dcc dcd dce dcm dcn dct dcu ddb ddc ddd dde ddm ddn ddt ddu de- deb dec ded dee dem den det deu dmb dmc dmd dme dmm dmn dmt dmu dnb dnc dnd dne dnm dnn dnt dtb dtc dtd dte dtm dtn dtt dtu dub duc dud due dum dun dut ebb ebc ebd ebe ebm ebn ebt ebu ec- ecb ecc ecd ece ecm ecn ect ecu ed- edb edc edd ede edm edn edt edu eeb eec eed eee eem een eet em- emb emc emd eme emm emn emt emu en- enb enc end ene enm enn ent enu etb etc etd ete etm etn ett etu eu- eub euc eud eue eun eut mbb mbc mbd mbe mbm mbt mbu mc- mcb mcc mcd mce mcm mcn mct mcu mdb mdc mdd mde mdm mdn mdt mdu meb mec med mee mem men met meu mmb mmc mmd mme mmm mmn mmt mmu mnb mnc mne mnm mnn mnt mnu mtb mtc mtd mte mtm mtn mtt mtu mub muc mud mue mum mun mut muu nbb nbc nbd nbe nbm nbn nbt nbu ncb ncc ncd nce ncm ncn nct ncu ndb ndc ndd nde ndm ndn ndt ndu ne- neb nec ned nee nem nen net neu nmb nmc nmd nme nmm nmn nmt nmu nnb nnc nne nnm nnn nnt nnu ntb ntc ntd nte ntm ntn ntt ntu nub nuc nud nue num nun nut nuu tbb tbc tbd tbe tbm tbn tbt tbu tcb tcc tcd tce tcm tcn tct tcu tdb tdc tdd tde tdm tdn tdt tdu te- teb tec ted tee tem ten tet teu tmb tmc tmd tme tmm tmn tmt tmu tnb tnc tnd tne tnm tnn tnt ttb ttc ttd tte ttm ttn ttt ttu tub tuc tud tue tum tun tut tuu ubb ubc ube ubn ubt ubu ucb ucc ucd uce ucm ucn uct ucu udb udc udd ude udm udn udt udu ueb uec ued uee uem uen uet um- umb umc umd ume umm umn umt umu un- unb unc und une unm unn unt unu utb utc utd ute utm utn utt utu uuc uue uum uun uut uuu