b-u bbb bbc bbg bbo bbr bbs bbt bbu bcb bcc bcg bco bcr bcs bct bcu bgb bgc bgg bgo bgr bgs bgt bgu bob boc bog boo bor bos bot bou brb brg bro brr brs brt bru bsb bsc bsg bso bsr bss bst bsu btb btc btg bto btr bts btt btu bub buc bug buo bur bus but buu c-- cbb cbc cbg cbo cbr cbs cbt cbu ccb ccc ccg cco ccr ccs cct ccu cgb cgc cgg cgo cgr cgs cgt cgu co- cob coc cog coo cor cos cot cou crb crc crg cro crr crs crt cru csb csc csg cso csr css cst csu ctb ctc ctg cto ctr cts ctt ctu cub cuc cug cuo cur cus cut cuu gbc gbg gbo gbr gbs gbt gbu gcb gcc gcg gco gcr gcs gct gcu ggb ggc ggg ggo ggr ggs ggt ggu gob goc gog goo gor gos got gou grb grc grg gro grr grs grt gru gsb gsc gsg gso gsr gss gst gsu gtb gtc gtg gto gtr gts gtt gtu gu- gub guc gug guo gur gus gut guu ob- obb obc obg obo obr obs obt obu oc- ocb occ ocg oco ocr ocs oct ocu ogc ogg ogo ogs ogt oo- oob ooc oog ooo oor oos oot or- orb orc org oro orr ors ort oru os- osb osc osg oso osr oss ost osu ot- otb otc otg oto otr ots ott otu ou- ouc ouo our ous out rbb rbc rbg rbo rbr rbs rbt rbu rcb rcc rcg rco rcr rcs rct rcu rgb rgc rgg rgo rgr rgs rgt rob roc rog roo ror ros rot rou rrb rrc rrg rrr rrs rrt rru rsb rsc rsg rso rsr rss rst rsu rtb rtc rtg rto rtr rts rtt rtu rub ruc rug ruo rur rus rut ruu sbb sbc sbg sbo sbr sbs sbt sbu scb scc scg sco scr scs sct scu sgb sgc sgg sgo sgr sgs sgt sgu sob soc sog soo sor sos sot sou sr- srb src srg sro srr srs srt ss- ssb ssc ssg sso ssr sss sst ssu stb stc stg sto str sts stt stu sub suc sug suo sur sus sut suu tbb tbc tbg tbo tbr tbs tbt tbu tcb tcc tcg tco tcr tcs tct tcu tgb tgc tgg tgo tgr tgs tgt tgu to- tob toc tog too tor tos tot tou trb trc trg tro trr trs trt tru tsb tsc tsg tso tsr tss tst tsu ttb ttc ttg tto ttr tts ttt ttu tub tuc tug tuo tur tus tut tuu ubb ubc ubg ubo ubr ubs ubt ubu ucb ucc ucg uco ucr ucs uct ucu ugb ugc ugg ugo ugr ugs ugt ugu uob uoc uog uoo uor uos uot ur- urb urc urg uro urr urs urt uru usb usc usg uso usr uss ust usu utb utc uto utr uts utt utu uuc uug uur uus uut uuu

-ous bbbb bbbs bbrc bbrg bcbc bcbg bcbs bccc bccs bcgs bcor bcos bcrs bcru bcsc bcss bctc bcts bcuc bggs bgst bobb bobo bobs bobu boco bocs bocu bogg bogo bogs bogt boob booc boog boor boos boot bor- borg boro borr bors bort boru bosc boso boss bost bosu botb boto bots bott bour bous bout brcb brob broc brog broo bror bros brot brou brrr brrs brsb brsr brst brtc bruc brug brus brut bscs bsgs bsos bssc bsts btcc btcs btob btor btrc btrt btss bttb btus bubb bubo bubs bubu bucc buco bucs bucu bugg bugo bugs bur- burb burg buro burr burs burt buru busc buss bust busu but- buto buts butt buus c-bo cbbc cbbs cbcc cbcr cbcs cbct cbcu cbgb cbot cbrt cbsc cbtc cbus ccbc cccb cccc cccs cccu ccgc ccgs ccgt ccob ccoc ccrc ccrg ccrs ccrt ccsg ccss ccst cctb cctc cctt ccuc ccus ccut cgcc cgcg cggs cgro cgsb cgss cgst cgtu cobb cobo cobs cobu coco coct cocu cogo cogs coob coos coot cor- corb corc corg coro corr cors cort cosc coso coss cost cotb cotc coto cots cott cotu coub cour cous cout crbc crbu crcc crcr crgs crob croc croo cror crot crrt crss crst crtc crts crub crug crus crut cscb cscc csco cscr cscs csob csor csos csot csrc csrs cssr cstc cstg csto cstr csts csur csus ctbs ctgu ctor ctos ctot ctrc ctrs ctsc ctss ctsu ctts cub- cubb cubs cucc curb curo curr curs curt cusb cusg cuso cuss cust cusu cut- cutc cuto cuts cutt gbbo gbbs gc-c gcbc gccc gccs gcos gcrg gcss gcst gcsu gctc gcts ggbt gggg ggss gobo gobs gocr gogo gogs goog goor goos goot gorb gorg goro gorr gors gort goso goss gost gosu goto gots gott gou- goug gour gous gout grbr grcc grob groc grog groo gror gros grot grou grrr grrs grss grtc grub grug grur grus grut gsoc gsos gstr gsur gtbr gtco gtcr gtcs gtos gubb gubs gubu gugb gugg gugu guos gurb gurg guro gurr gurs gurt guru gusb guss gust guto guts gutt gutu guus obbo obor obos obot obro obsr obss obst obts obus ocbc occc occt ocos ocro ocrr ocrs oct- octo octs ocur ogb ogog ogou ogro ogus oocr oooo ooos oort oost ootb oots oous orbb orbo orbs orbu orco orcs orgo orgs oro- oror oros orot orro orrs orso orsu ortc orto orts orub orus oscc osco osoo osor osos osro ossb osso ossu ostc ostr osts otbs oto- otog otoo otor otos otro otrs otsg otso otsu otto otts ottu otur otus oubs oucc our- ouro ours ourt oust out- outb outo outs ouu- rbbb rbbr rbbs rbss rbst rcbc rcbo rccb rccc rccs rcgc rcos rcrg rcsc rcss rctc rctg rcts rgtr rgts rob- robb robo robs robt robu rocc roco rocs rogg rogo roob roog roor