b-u bbb bbc bbm bbr bbs bbt bbu bcb bcc bcm bcr bcs bct bcu bmb bmc bmm bmr bms bmt bmu brb brm brr brs brt bru bsb bsc bsm bsr bss bst bsu btb btc btm btr bts btt btu bub buc bum bur bus but buu c-- cbb cbc cbm cbr cbs cbt cbu ccb ccc ccm ccr ccs cct ccu cmb cmc cmm cmr cms cmt cmu crb crc crm crr crs crt cru csb csc csm csr css cst csu ctb ctc ctm ctr cts ctt ctu cub cuc cum cur cus cut cuu m-r mbb mbc mbm mbr mbs mbt mbu mc- mcb mcc mcm mcr mcs mct mcu mmb mmc mmm mmr mms mmt mmu mrb mrc mrm mrr mrs mrt mru msb msc msm msr mss mst msu mtb mtc mtm mtr mts mtt mtu mub muc mum mur mus mut muu rbb rbc rbm rbr rbs rbt rbu rcb rcc rcm rcr rcs rct rcu rmb rmc rmm rmr rms rmt rrb rrc rrm rrr rrs rrt rru rsb rsc rsm rsr rss rst rsu rtb rtc rtm rtr rts rtt rtu rub ruc rum rur rus rut ruu sbb sbc sbm sbr sbs sbt sbu scb scc scm scr scs sct scu smb smc smm smr sms smt smu sr- srb src srm srr srs srt ss- ssb ssc ssm ssr sss sst ssu stb stc stm str sts stt stu sub suc sum sur sus sut suu tbb tbc tbm tbr tbs tbt tbu tcb tcc tcm tcr tcs tct tcu tmb tmc tmm tmr tms tmt tmu trb trc trm trr trs trt tru tsb tsc tsm tsr tss tst tsu ttb ttc ttm ttr tts ttt ttu tub tuc tum tur tus tut tuu ubb ubc ubr ubs ubt ubu ucb ucc ucm ucr ucs uct ucu um- umb umc umm umr ums umt umu ur- urb urc urm urr urs urt uru usb usc usm usr uss ust usu utb utc utm utr uts utt utu uuc uum uur uus uut uuu

bbbb bbbs bbcm bbrc bcbc bcbs bccc bccm bccs bcms bcrs bcru bcsc bcsm bcss bctc bcts bcuc bmtc bmts bmus brcb brmc brrm brrr brrs brsb brsr brst brtc bruc brum brus brut bscs bsms bsmt bsrm bssc bssm bsts btcc btcs btrc btrt btss bttb btus bubb bubs bubu bucc bucs bucu bum- bumb bums bur- burb burm burr burs burt buru busc buss bust busu but- buts butt buus cbbc cbbs cbcc cbcm cbcr cbcs cbct cbcu cbms cbrm cbrt cbsc cbsm cbtc cbus ccbc cccb cccc cccm cccs cccu ccmb ccmc ccmm ccms ccrc ccrs ccrt ccss ccst cctb cctc cctt ccuc ccus ccut cmbc cmbs cmcc cmcs cmmb cmmc cmms cmrr cmrs cmsc cmst cmtc cmtu cmus crbc crbu crcc crcr crmb crms crrt crss crst crtc crtm crts crub crum crus crut csbm cscb cscc cscr cscs csmc csmu csrc csrs cssm cssr cstc cstm cstr csts csum csur csus ctbs ctrc ctrm ctrs ctsc ctss ctsu ctts cub- cubb cubs cucc cucm cum- cums cumt curb curr curs curt cusb cuss cust cusu cut- cutc cuts cutt mbbs mbcs mbms mbrs mbus mcbc mccc mcmc mcmt mcrc mcss mcst mctc mcts mctu mmcc mmcm mmcs mmct mmmc mmmm mmms mmrc mmsc mmst mmsu mmts mmus mr-c mrbb mrbm mrbs mrcb mrcc mrcs mrmc mrrc mrsc mrtm mrts mrtt mscc msmb msmc msmm msms msmu msrb msrt mssm mssr msst mstc mstr msts msus mtbc mtbs mtcr mtrc mtrr mtss mtst mttr mtts mtuc mubs muc- mucc mucu mumm mums mumu murc murr murs murt muru musc muss must musu muts mutt mutu muut rbbb rbbr rbbs rbms rbss rbst rcbc rccb rccc rccs rcms rcsc rcss rctc rcts rmbs rmsc rmst rmtu rrmc rrrr rrum rscc rscs rsts rstu rsum rtcc rtcm rtmc rtms rtss rtts rubb rubs rubu ruct rumb rumm rums rumt rurc rurs ruru russ rust rusu ruts rutt rutu sbbs sbcc sbcs sbct sbmc sbst sbtc sbus sccc sccm sccs scct scmc scmm scms scr- scrc scrs scsc scsr scst scsu sctc sctr scts scub scum scur scut smbc smcc smrt smsc smss smtc smtu smur smus smut srbc srcc srct srmc srtr srub ssbr sscc sscs ssmc ssrc ssrm ssrs sssb sssc sssm ssss sstb sstc ssts stbc stbs stcc stcs stcu stmc stms stmt strc strs stru stsm stss sttc sttr stub stuc stum stur stus stut sub- subb subm subs suc- succ sucr sucs sum- sums sumu sur- surc surr surs surt suru sus- suss sust susu sutu suum suus tbbs tbcb tbcc tbrb tbst tcbs tccc tccu tctc tcts tmbc tmbr tmcc tmcm tmsc tmtt trcc trmb trms trmu trst trtc trtr trub truc trus trut truu tsbc tscc tsmc tssm tssr tsst tstc tstm tsts tsum ttbb ttms ttss tttt tubb tubr tubs tubu tucc tumb tums tumu turb turc turm turr turs turt turu tusc tusm tuss tust tuts tutt tutu tuum ucbc ucmc ucrc ucsb ucsc ucsm ucst ucsu ucut umb- umms umsu umts umus umut urbs urss ursu urts urum urur urus urut usbc usbr usbs uscc uscm uscs usmc usmm usms ussb ussc ussr usss usst ussu ustb ustc ustm usts usus utmb utsc uttu uuuu

bbsrc bbuss bcbst bmcsr bmrst brmmm brrrr brumm bruss brust btr-t btstu bttms bucsu bucum bucur bumbu burbs burcu burrs burru burst burts burtt buruc burus burut bussu busts busum busur busut busuu butts butut c-bus ccccc cmbst crumb crums crust cruts cstcc ctcum ctrsm cubub cumbu cumm- curbs currs curst curts cusum cutcu cutts mbccs mburu mcbbs mmccc mmmcc mmmmm mrcub mt-tc mt-tm mt-tr mt-tt muctc mucum mucur mucus mumcu mummu murru murum murus murut musc- musts mustu mutsu mutts mutum mutus rmutt rsust rubus rummu rumst rus-m rusts rustu ruutu s-bus sccbc scrms scrub scrum scrus sctrs scum- scumm scums scurr scurt scut- scuts scutt smbus smurr smuss smuts sssrb sssss stcum strrs strsm strub struc