b-u bbb bbc bbe bbm bbn bbo bbs bbt bbu bcb bcc bce bcm bcn bco bcs bct bcu be- beb bec bee bem ben beo bes bet beu bmb bmc bme bmm bmn bmo bms bmt bmu bnb bnc bne bnn bno bns bnt bnu bob boc boe bom bon boo bos bot bou bsb bsc bse bsm bsn bso bss bst bsu btb btc bte btm btn bto bts btt btu bub buc bue bum bun buo bus but buu c-- cbb cbc cbe cbm cbn cbo cbs cbt cbu ccb ccc cce ccm ccn cco ccs cct ccu ce- ceb cec cee cem cen ceo ces cet ceu cmb cmc cme cmm cmn cmo cms cmt cmu cn- cnb cnc cne cnm cnn cno cns cnt cnu co- cob coc coe com con coo cos cot cou csb csc cse csm csn cso css cst csu ctb ctc cte ctm ctn cto cts ctt ctu cub cuc cue cum cun cuo cus cut cuu ebb ebc ebe ebm ebn ebo ebs ebt ebu ec- ecb ecc ece ecm ecn eco ecs ect ecu eeb eec eee eem een eeo ees eet em- emb emc eme emm emn emo ems emt emu en- enb enc ene enm enn eno ens ent enu eo- eob eoc eoe eom eon eoo eos eot eou es- esb esc ese esm esn eso ess est esu etb etc ete etm etn eto ets ett etu eu- eub euc eue eun eus eut m-o mbb mbc mbe mbm mbo mbs mbt mbu mc- mcb mcc mce mcm mcn mco mcs mct mcu meb mec mee mem men meo mes met meu mmb mmc mme mmm mmn mmo mms mmt mmu mnb mnc mne mnm mnn mno mns mnt mnu mob moc moe mom mon moo mos mot mou msb msc mse msm msn mso mss mst msu mtb mtc mte mtm mtn mto mts mtt mtu mub muc mue mum mun mus mut muu nbb nbc nbe nbm nbn nbo nbs nbt nbu ncb ncc nce ncm ncn nco ncs nct ncu ne- neb nec nee nem nen neo nes net neu nmb nmc nme nmm nmn nmo nms nmt nmu nnb nnc nne nnm nnn nno nns nnt nnu no- nob noc noe nom non noo nos not nou nsb nsc nse nsm nsn nso nss nst nsu ntb ntc nte ntm ntn nto nts ntt ntu nub nuc nue num nun nuo nus nut nuu ob- obb obc obe obm obn obo obs obt obu oc- ocb occ ocm ocn oco ocs oct ocu oeb oec oee oem oen oeo oes oet om- omb omc ome omm omn omo oms omt omu on- onb onc one onn ono ons ont onu oo- oob ooc oom oon ooo oos oot os- osb osc ose osm osn oso oss ost osu ot- otb otc ote otm otn oto ots ott otu ou- ouc oue oum oun ouo ous out sbb sbc sbe sbm sbn sbo sbs sbt sbu scb scc sce scm scn sco scs sct scu se- seb sec see sem sen seo ses set seu smb smc sme smm smn smo sms smt smu snb snc sne snm snn sno sns snt snu sob soc soe som son soo sos sot sou ss- ssb ssc sse ssm ssn sso sss sst ssu stb stc ste stm stn sto sts stt stu sub suc sue sum sun suo sus sut suu tbb tbc tbe tbm tbn tbo tbs tbt tbu tcb tcc tce tcm tcn tco tcs tct tcu te- teb tec tee tem ten teo tes tet teu tmb tmc tme tmm tmn tmo tms tmt tmu tnb tnc tne tnm tnn tno tns tnt to- tob toc toe tom ton too tos tot tou tsb tsc tse tsm tsn tso tss tst tsu ttb ttc tte ttm ttn tto tts ttt ttu tub tuc tue tum tun tuo tus tut tuu ubb ubc ube ubn ubo ubs ubt ubu ucb ucc uce ucm ucn uco ucs uct ucu ueb uec uee uem uen ues uet um- umb umc ume umm umn umo ums umt umu un- unb unc une unm unn uno uns unt unu uob uoc uoe uom uon uoo uos uot usb usc use usm usn uso uss ust usu utb utc ute utm utn uto uts utt utu uuc uue uum uun uus uut uuu