bbb bbc bbd bbk bbo bbr bbs bbt bcb bcc bcd bck bco bcr bcs bct bdb bdc bdd bdk bdo bdr bds bdt bkb bkc bkk bko bkr bks bkt bob boc bod bok boo bor bos bot brb brd brk bro brr brs brt bsb bsc bsd bsk bso bsr bss bst btb btc btd btk bto btr bts btt c-- cbb cbc cbd cbk cbo cbr cbs cbt ccb ccc ccd cck cco ccr ccs cct cdb cdc cdd cdk cdo cdr cds cdt ckb ckc ckd cko cks ckt co- cob coc cod cok coo cor cos cot crb crc crd crk cro crr crs crt csb csc csd csk cso csr css cst ctb ctc ctd ctk cto ctr cts ctt dbb dbc dbd dbk dbo dbr dbs dbt dcb dcc dcd dck dco dcr dcs dct ddb ddc ddd ddk ddo ddr dds ddt dkb dkc dkk dko dkr dks dkt dob doc dod dok doo dor dos dot drb drc drd drk dro drr drs drt dsb dsc dsd dsk dso dsr dss dst dtb dtc dtd dtk dto dtr dts dtt k-t kbb kbc kbd kbk kbo kbr kbs kcb kcc kcd kck kcr kcs kct kdb kdc kdk kdo kdr kds kdt kkb kkc kkk kkr kks kkt kob koc kod kok koo kor kos kot krc krd krk kro krr krs krt ksb ksc ksd ksk kso ksr kss kst ktb ktc ktk kto ktr kts ktt ob- obb obc obd obk obo obr obs obt oc- ocb occ ocd ock oco ocr ocs oct odb odc odd odo odr ods odt okb okc okd okk oko okr oks oo- oob ooc ood ook ooo oor oos oot or- orb orc ord ork oro orr ors ort os- osb osc osd osk oso osr oss ost ot- otb otc otd otk oto otr ots ott rbb rbc rbd rbk rbo rbr rbs rbt rcb rcc rcd rco rcr rcs rct rdb rdc rdd rdo rdr rds rdt rkb rkc rkk rko rks rkt rob roc rod rok roo ror ros rot rrb rrc rrd rrk rrr rrs rrt rsb rsc rsd rsk rso rsr rss rst rtb rtc rtd rtk rto rtr rts rtt sbb sbc sbd sbk sbo sbr sbs sbt scb scc scd sck sco scr scs sct sdb sdc sdd sdk sdo sdr sds sdt sk- skb skc skd skk sko skr sks skt sob soc sod sok soo sor sos sot sr- srb src srd srk sro srr srs srt ss- ssb ssc ssd ssk sso ssr sss sst stb stc std stk sto str sts stt tbb tbc tbd tbk tbo tbr tbs tbt tcb tcc tcd tck tco tcr tcs tct tdb tdc tdd tdk tdo tdr tds tdt tkb tkc tkk tko tkr tks tkt to- tob toc tod tok too tor tos tot trb trc trd trk tro trr trs trt tsb tsc tsd tsk tso tsr tss tst ttb ttc ttd ttk tto ttr tts ttt

bbbb bbbs bbdd bbdo bbrc bcbc bcbs bccc bccs bcds bcor bcos bcrs bcsc bcss bctc bcts bd-r bdbc bddc bdos bdsd bobb bobo bobs bock boco bocs bodb bodo bods boko boks boob booc bood book boor boos boot bor- bord bork boro borr bors bort bosc bosk boso boss bost botb botd boto bots bott brcb brdo brds brdt brkb brob broc brod brok broo bror bros brot brrr brrs brsb brsr brst brtc bsbd bscs bskt bsod bsos bsrd bssc bssd bsts btcc btcs btdt btob btor btrc btrt btss bttb c-bo c-cd cbbc cbbs cbcc cbcr cbcs cbct cbdb cbdc cbdo cbds cbko cbkr cbot cbrd cbrt cbsc cbtc ccbc cccb cccc cccs ccdc ccdr ccds ccob ccoc ccod ccrc ccrs ccrt ccsd ccss ccst cctb cctc cctt cd-r cdcs cddb cddr cdos cdot cdrs cdss ckbc ckck ckco ckcs ckdo ckob ckoc ckoo ckor ckos ckot ckrc ckrd cksb ckso ckst cktb ckts cobb cobo cobs cock coco coct codd cods cok- coko coob cood cook coos coot cor- corb corc cord cork coro corr cors cort cosc coso coss cost cotb cotc coto cots cott crbc crcc crcr crdc crkc crob croc crod crok croo cror crot crrt crss crst crtc crts cscb cscc cscd csco cscr cscs csdb csdr csks csob csor csos csot csrc csrd csrs cssd cssr cstc cstd csto cstr csts ctbs ctor ctos ctot ctrc ctrs ctsc ctss ctts d-bo dbcc dbcs dbos dbrs dbss dbtt dcbc dccb dccc dccs dcct dcdb dcds dcos dcrk dcsc dcss dctc dcts dddd ddoc ddot ddrc ddss ddts dkdc dobb dobs dock doco docs doct dod- dodd dodo dods doko doob dood dook door doos doot dorc dord dork doro dorr dors dort dosk doso doss dost dotd dotk doto dots dott drbc drob drod drot drrs dsbc dscc dscr dscs dsdr dsos dsrc dsrr dssc dsst dstc dsto dsts dtcc dtor dtot dtss k-os kbbb kbbc kbbd kbbk kbbo kbbr kbbs kbbt kbcb kbck kbco kbcr kbcs kbct kbdb kbdo kbdr kbds kbkb kbkk kbko kbkr kbob kboc kbod kbok kboo kbos kbot kbrb kbrc kbrd kbrk kbro kbrt kbsb kbsk kbso kbsr kbss kbst kbtb kbtc kbtk kbto kbtr kbts kbtt kcbc kcbd kcbk kcbr kcbs kccb kccc kccd kcck kccr kcct kcdc kcdd kcdr kcds kckc kckk kcko kckr kcob kcor kcos kcot kcrc kcro kcrr kcrs kcrt kcsb kcsc kcsd kcsr kcss kcst kctb kctc kcto kdbb kdbr kdbs kdcc kdcd kdco kdcr kddb kddc kddd kddk kddr kdkb kdkd kdkk kdko kdkr kdkt kdoc kdok kdot kdrb kdro kdrs kdsc kdsd kdsk kdsr kdss kdst kdtd kdtr kkbb kkbd kkbo kkbr kkbs kkbt kkcb kkcd kkck kkco kkcr kkcs kkct kkdc kkdd kkdo kkdt kkkk kkob kkoo kkor kkot kkrb kkrc kkrk kkro kkrr kkrs kkrt kksd kksr kkss kkst kktc kktk kkts kobb kobc kobk kobo kobr kobs kocb kocd kock kocs koct kodk kodo kods kodt kokb kokc kokk koko