b-u bbb bbc bbe bbm bbn bbt bbu bcb bcc bce bcm bcn bct bcu be- beb bec bee bem ben bet beu bmb bmc bme bmm bmn bmt bmu bnb bnc bne bnn bnt bnu btb btc bte btm btn btt btu bub buc bue bum bun but buu c-- cbb cbc cbe cbm cbn cbt cbu ccb ccc cce ccm ccn cct ccu ce- ceb cec cee cem cen cet ceu cmb cmc cme cmm cmn cmt cmu cn- cnb cnc cne cnm cnn cnt cnu ctb ctc cte ctm ctn ctt ctu cub cuc cue cum cun cut cuu ebb ebc ebe ebm ebn ebt ebu ec- ecb ecc ece ecm ecn ect ecu eeb eec eee eem een eet em- emb emc eme emm emn emt emu en- enb enc ene enm enn ent enu etb etc ete etm etn ett etu eu- eub euc eue eun eut mbb mbc mbe mbm mbt mbu mc- mcb mcc mce mcm mcn mct mcu meb mec mee mem men met meu mmb mmc mme mmm mmn mmt mmu mnb mnc mne mnm mnn mnt mnu mtb mtc mte mtm mtn mtt mtu mub muc mue mum mun mut muu nbb nbc nbe nbm nbn nbt nbu ncb ncc nce ncm ncn nct ncu ne- neb nec nee nem nen net neu nmb nmc nme nmm nmn nmt nmu nnb nnc nne nnm nnn nnt nnu ntb ntc nte ntm ntn ntt ntu nub nuc nue num nun nut nuu tbb tbc tbe tbm tbn tbt tbu tcb tcc tce tcm tcn tct tcu te- teb tec tee tem ten tet teu tmb tmc tme tmm tmn tmt tmu tnb tnc tne tnm tnn tnt ttb ttc tte ttm ttn ttt ttu tub tuc tue tum tun tut tuu ubb ubc ube ubn ubt ubu ucb ucc uce ucm ucn uct ucu ueb uec uee uem uen uet um- umb umc ume umm umn umt umu un- unb unc une unm unn unt unu utb utc ute utm utn utt utu uuc uue uum uun uut uuu