-th bbb bbc bbh bbk bbo bbr bbs bbt bcb bcc bch bck bco bcr bcs bct bhb bhc bhh bhk bho bhr bhs bht bkb bkc bkk bko bkr bks bkt bob boc boh bok boo bor bos bot brb brh brk bro brr brs brt bsb bsc bsh bsk bso bsr bss bst btb btc bth btk bto btr bts btt c-- cbb cbc cbh cbk cbo cbr cbs cbt ccb ccc cch cck cco ccr ccs cct ch- chb chc chh chk cho chr chs cht ckb ckc ckh cko cks ckt co- cob coc coh cok coo cor cos cot crb crc crh crk cro crr crs crt csb csc csh csk cso csr css cst ctb ctc cth ctk cto ctr cts ctt hbb hbc hbh hbk hbo hbr hbs hbt hcb hcc hch hck hco hcr hcs hct hhb hhc hhh hhk hho hhr hhs hht hkb hkh hkk hko hkr hks hkt hob hoc hoh hok hoo hor hos hot hr- hrb hrc hrh hrk hro hrr hrs hrt hsb hsc hsh hsk hsr hss hst htb htc hth htk hto htr hts htt k-t kbb kbc kbh kbk kbo kbr kbs kcb kcc kch kck kcr kcs kct khh khk kho khr khs kkb kkc kkh kkk kkr kks kkt kob koc koh kok koo kor kos kot krc krk kro krr krs krt ksb ksc ksh ksk kso ksr kss kst ktb ktc kth ktk kto ktr kts ktt ob- obb obc obh obk obo obr obs obt oc- ocb occ och ock oco ocr ocs oct ohc ohh oho ohr ohs oht okb okc okk oko okr oks oo- oob ooc ooh ook ooo oor oos oot or- orb orc orh ork oro orr ors ort os- osb osc osh osk oso osr oss ost ot- otb otc oth otk oto otr ots ott rbb rbc rbh rbk rbo rbr rbs rbt rcb rcc rch rco rcr rcs rct rh- rhb rhc rhh rho rhr rhs rht rkb rkc rkk rko rks rkt rob roc roh rok roo ror ros rot rrb rrc rrh rrk rrr rrs rrt rsb rsc rsh rsk rso rsr rss rst rtb rtc rtk rto rtr rts rtt sbb sbc sbh sbk sbo sbr sbs sbt scb scc sch sck sco scr scs sct sh- shb shc shh shk sho shr shs sht sk- skb skc skh skk sko skr sks skt sob soc soh sok soo sor sos sot sr- srb src srh srk sro srr srs srt ss- ssb ssc ssh ssk sso ssr sss sst stb stc sth stk sto str sts stt tbb tbc tbh tbk tbo tbr tbs tbt tcb tcc tch tck tco tcr tcs tct th- thb thc thh thk tho thr ths tht tkb tkc tkk tko tkr tks tkt to- tob toc toh tok too tor tos tot trb trc trh trk tro trr trs trt tsb tsc tsh tsk tso tsr tss tst ttb ttc tth ttk tto ttr tts ttt

bbbb bbbs bbch bbhs bbrc bcbc bcbs bccc bccs bchs bcor bcos bcrs bcsc bcss bctc bcts bhcc bhhs bhor bhot bhrt bkhs bobb bobo bobs boch bock boco bocs boho bohr bohs boht boko boks boob booc booh book boor boos boot bor- borh bork boro borr bors bort bosc bosh bosk boso boss bost botb both boto bots bott brcb brhs brkb brob broc broh brok broo bror bros brot brrr brrs brsb brsr brst brtc bscs bshs bskt bsos bssc bsts btcc btcs bths btob btor btrc btrt btss bttb c-bo cbbc cbbs cbcc cbcr cbcs cbct cbhs cbko cbkr cbot cbrh cbrt cbsc cbtc ccbc cccb cccc cccs cchr cchs ccob ccoc ccrc ccrs ccrt ccss ccst cctb cctc cctt chch chcs chhs chkb chks chkt choc choh chok choo chor chos chrb chrc chro chrr chrs chrt chsc chsh chsr chst chto chtr chtt ckbc ckch ckck ckco ckcs ckhs ckob ckoc ckoo ckor ckos ckot ckrc cksb cksh ckso ckst cktb ckts cobb cobh cobo cobs coch cock coco coct coho cohs cok- coko coob cooh cook coos coot cor- corb corc cork coro corr cors cort cosc cosh coso coss cost cotb cotc coth coto cots cott crbc crcc crcr crhs crkc crob croc croh crok croo cror crot crrt crss crst crtc crts cscb cscc csch csco cscr cscs cshs csks csob csor csos csot csrc csrs cssr cstc csto cstr csts ctbs cths ctor ctos ctot ctrc ctrs ctsc ctss ctts hbbs hbhs hboc hbos hbrs hbss hcbc hcbs hccb hccc hcch hccs hchs hcsc hcso hcss hcst hhhh hhhs hkcc hkcs hkst hobo hobs hoch hock hocr hocs hoho hoko hoks hook hoor hoos hoot horc hork horo horr hors hort hosh hoss host hotb hoth hoto hotr hots hott hrhs hrob hros hrrc hrso hrtb hsbc hscc hsct hshs hsob hsts htcc hths htoh htrk htsc httr k-os kbbb kbbc kbbk kbbo kbbr kbbs kbbt kbcb kbch kbck kbco kbcr kbcs kbct kbhb kbhc kbhh kbhr kbhs kbht kbkb kbkk kbko kbkr kbob kboc kbok kboo kbos kbot kbrb kbrc kbrh kbrk kbro kbrt kbsb kbsk kbso kbsr kbss kbst kbtb kbtc kbtk kbto kbtr kbts kbtt kcbc kcbk kcbr kcbs kccb kccc kcck kccr kcct kchh kchk kcho kchr kchs kckc kckk kcko kckr kcob kcoh kcor kcos kcot kcrc kcrh kcro kcrr kcrs kcrt kcsb kcsc kcsr kcss kcst kctb kctc kcto khbc khbr khbs khbt khcb khcc khch khck khcs khct khhk khho khhs khkk khkr khks khob khoc khok khor khot khrk khro khrr khrt khss khst khtb khth khtk khto khtr khts khtt kkbb kkbo kkbr kkbs kkbt kkcb kkch kkck kkco kkcr kkcs kkct kkhb kkhh kkhk kkhr kkkk kkob kkoh kkoo kkor kkot kkrb kkrc kkrh kkrk kkro kkrr kkrs kkrt kksr kkss kkst kktc kktk kkts kobb kobc kobk kobo kobr kobs kocb koch kock kocs koct kohh koho kohr kohs koht kokb kokc kokh