-ic b-u bbb bbc bbi bbr bbs bbt bbu bbx bcb bcc bci bcr bcs bct bcu bcx bi- bib bic bii bir bis bit biu bix brb bri brr brs brt bru brx bsb bsc bsi bsr bss bst bsu bsx btb btc bti btr bts btt btu btx bub buc bui bur bus but buu bux bxb bxi bxx c-- cbb cbc cbi cbr cbs cbt cbu cbx ccb ccc cci ccr ccs cct ccu ccx ci- cib cic cii cir cis cit ciu cix crb crc cri crr crs crt cru crx csb csc csi csr css cst csu csx ctb ctc cti ctr cts ctt ctu ctx cub cuc cui cur cus cut cuu cxc cxi cxr cxs cxt cxx ibb ibc ibi ibr ibs ibt ibu ibx icb icc ici icr ics ict icu iib iic iii iir iis iit iiu iix ir- irb irc iri irr irs irt iru irx is- isb isc isi isr iss ist isu itb itc iti its itt itu itx iu- iub iuc iui iur ius iut ixc ixi rbb rbc rbi rbr rbs rbt rbu rbx rcb rcc rci rcr rcs rct rcu rcx rib ric rii rir ris rit rix rrb rrc rri rrr rrs rrt rru rsb rsc rsi rsr rss rst rsu rsx rtb rtc rti rtr rts rtt rtu rtx rub ruc rui rur rus rut ruu rux rxr rxs sbb sbc sbi sbr sbs sbt sbu sbx scb scc sci scr scs sct scu scx sib sic sii sir sis sit siu six sr- srb src sri srr srs srt srx ss- ssb ssc ssi ssr sss sst ssu ssx stb stc sti str sts stt stu stx sub suc sui sur sus sut suu sux sxc sxi sxs sxt sxu t-x tbb tbc tbi tbr tbs tbt tbu tcb tcc tci tcr tcs tct tcu tcx tib tic tii tir tis tit tiu tix trb trc tri trr trs trt tru trx tsb tsc tsi tsr tss tst tsu tsx ttb ttc tti ttr tts ttt ttu ttx tub tuc tui tur tus tut tuu tux txi txs txt txu ubb ubc ubi ubr ubs ubt ubu ubx ucb ucc uci ucr ucs uct ucu uib uic uii uir uis uit uiu ur- urb urc uri urr urs urt uru urx usb usc usi usr uss ust usu usx utb utc uti utr uts utt utu utx uuc uur uus uut uuu uxb uxc uxr uxt uxu xbc xbr xbx xcb xci xcr xcx xic xii xis xit xiu xix xrc xrt xrx xsb xsc xsi xss xst xtc xti xtr xts xtx xui xus xxi xxx

bbbb bbbs bbci bbrc bcbc bcbs bccc bcci bccs bcis bcit bcrs bcru bcsc bcss bctc bcts bcuc bibb bibi bibs bicc bici bics biis birb biri birr birs birt biru birx bis- bisc biss bist bisu bitc bits bitt bitu bitx bixi brcb bric bris brit brix brrr brrs brsb brsr brst brtc bruc brus brut brux bsci bscs bsic bsix bssc bsts btcc btcs btcx btrc btrt btss bttb btus bubb bubi bubs bubu bucc buci bucs bucu buic buir buis buit buiu buix bur- burb buri burr burs burt buru busc busi buss bust busu busx but- buti buts butt buus cbbc cbbs cbcc cbcr cbcs cbct cbcu cbir cbit cbrt cbsc cbsi cbtc cbus cbux ccbc cccb cccc ccci cccs cccu ccic ccii ccir ccis ccix ccrc ccri ccrs ccrt ccsi ccss ccst cctb cctc cctt ccuc ccus ccut ccxi cibc cibi cicc cici cicr cics cict cicu ciii ciis ciit cirb circ ciri cirr cirs cirt cis- cisc cisr ciss cist citb citi cits citt citu ciuc cius cixi crbc crbu crcc crcr crib cric cris crit criu crrt crss crst crtc crts crub crus crut crux cscb cscc csci cscr cscs csib csir csis csit csix csrc csrs cssr cstc cstr csts cstx csur csus csxt ctbi ctbs ctic ctrc ctrs ctsc ctss ctsu ctts cub- cubb cubi cubs cucc cuci cui- cuir cuis cuit curb curi curr curs curt cusb cuss cust cusu cut- cutc cuts cutt cxii cxix cxxi cxxx ibcs ibis ibrc ibri ibss ibtb ibtc ibts ibus icbc icbs iccb iccc icci iccr iccs icct iccu icis icrc icrr icrs icrt icru icsb icsc icsi icsr icss icst icts icub icus iiii iiis iiit iirc iirs iisc iisi iisr iist iisu iitr iitt iiuc ircc ircs ircu ircx iri- iric iris irix irrc irri irrs irti irts irus isbt isbx iscc isci iscr iscs isct iscu isic isis isit isri issc issi issr isss issu istc isti istr ists isus itbs itcs itic itis itri itrs itsi itsu itur iucc iuiu iuss iust ixxi rbbb rbbr rbbs rbis rbss rbst rcbc rccb rccc rccs rcic rcis rcsc rcsi rcss rctc rcti rcts rib- ribs ribu ricc rics rict riis riri rirs risc risi riss rist risu riti rits ritt ritu rius rixc rrrr rsbi rscc rscs rsis rsts rstu rtcc rtss rtts rubb rubi rubs rubu ruci ruct ruis ruit rurc ruri rurs ruru rusi russ rust rusu ruti ruts rutt rutu s-ib s-ic s-ii sbbs sbcc sbcs sbct sbic sbsi sbst sbtc sbus scbi sccc sccs scct sci- scic scir scis scit scr- scrc scri scrs scsc scsi scsr scst scsu sctc sctr scts scub scur scut sibc sibi sibs sibu sicc sici sics sicu siit sirc siri sirr sirs sirt siru sisc sisi siss sist sisu sit- sitc siti sits sitt situ siui sius siut sixt sixx srbc srcc srct srib sris srtr srub ssbr sscc ssci sscs ssis ssit ssrc ssri ssrs sssb sssc sssi ssss sstb sstc ssts stbc stbs stcc stcs stcu stib stic stir stis stit stix strc stri strs stru stsi stss sttc sttr stub stuc stur stus stut stux sub- subb subi subs suc- succ suci sucr sucs suir suis suit sur- surc suri surr surs surt suru sus- susi suss sust susu suti sutu suus sux-