-ol bbb bbc bbk bbl bbo bbr bbs bcb bcc bck bcl bco bcr bcs bkb bkc bkk bkl bko bkr bks blb blc blk bll blo blr bls bob boc bok bol boo bor bos brb brk brl bro brr brs bsb bsc bsk bsl bso bsr bss c-- cbb cbc cbk cbl cbo cbr cbs ccb ccc cck ccl cco ccr ccs ckb ckc cko cks cl- clb clc clk cll clo clr cls co- cob coc cok col coo cor cos crb crc crk crl cro crr crs csb csc csk csl cso csr css kbb kbc kbk kbl kbo kbr kbs kcb kcc kck kcl kcr kcs kkb kkc kkk kkl kkr kks kl- klb klc klo klr kls kob koc kok kol koo kor kos krc krk krl kro krr krs ksb ksc ksk ksl kso ksr kss lbb lbc lbk lbl lbo lbr lbs lcb lcc lck lcl lco lcr lcs lkb lkl lkr lks llb llc llk lll llo llr lls lob loc lok lol loo lor los lrb lrc lrk lro lrr lrs lsb lsc lsk lsl lso lsr lss ob- obb obc obk obl obo obr obs oc- ocb occ ock ocl oco ocr ocs okb okc okk okl oko okr oks olb olc olk oll olo ols oo- oob ooc ook ool ooo oor oos or- orb orc ork orl oro orr ors os- osb osc osk osl oso osr oss rbb rbc rbk rbl rbo rbr rbs rcb rcc rcl rco rcr rcs rkb rkc rkk rko rks rlc rll rlo rlr rls rob roc rok rol roo ror ros rrb rrc rrk rrl rrr rrs rsb rsc rsk rsl rso rsr rss sbb sbc sbk sbl sbo sbr sbs scb scc sck scl sco scr scs sk- skb skc skk skl sko skr sks slb slc slk sll slo slr sls sob soc sok sol soo sor sos sr- srb src srk srl sro srr srs ss- ssb ssc ssk ssl sso ssr sss

bbbb bbbs bblb bbls bbrc bcbc bcbs bccc bccl bccs bcor bcos bcrs bcsc bcsl bcss blkb blls blob bloc blok bloo blrc blss bobb bobo bobs bock boco bocs boko boks bolk boll bolo bols boob booc book bool boor boos bor- bork boro borr bors bosc bosk boso boss brcb brkb brls brob broc brok brol broo bror bros brrr brrs brsb brsr bscs bslc bsos bssc c-bo cbbc cbbs cbcc cbcl cbcr cbcs cbkl cbko cbkr cblb cblc cbol cbrl cbsc ccbc cccb cccc cccl cccs cclc ccls ccob ccoc ccrc ccrl ccrs ccsl ccss ckbc ckck ckcl ckco ckcs ckob ckoc ckoo ckor ckos ckrc cksb cksl ckso clob clok cloo clor clos clro clrs clsc cobb cobo cobs cock coco cok- coko col- colb colk coll colo cols coob cook cool coos cor- corb corc cork corl coro corr cors cosc cosl coso coss crbc crcc crcr crkc crkl crls crob croc crok crol croo cror crss cscb cscc cscl csco cscr cscs csks cslr csob csor csos csrc csrs cssr k-lo k-os kbbb kbbc kbbk kbbl kbbo kbbr kbbs kbcb kbck kbcl kbco kbcr kbcs kbkb kbkk kbkl kbko kbkr kblb kbll kblo kblr kbls kbob kboc kbok kboo kbos kbrb kbrc kbrk kbrl kbro kbsb kbsk kbso kbsr kbss kcbc kcbk kcbl kcbr kcbs kccb kccc kcck kccl kccr kckc kckk kckl kcko kckr kclc kclk kcll kclr kcls kcob kcol kcor kcos kcrc kcro kcrr kcrs kcsb kcsc kcsr kcss kkbb kkbl kkbo kkbr kkbs kkcb kkck kkcl kkco kkcr kkcs kkkk kklb kklc kkll kklo kkls kkob kkol kkoo kkor kkrb kkrc kkrk kkrl kkro kkrr kkrs kksr kkss klbb klbc klbl klbs klcb klcc klck klcl klcr klcs klkc klkk klkl klko klkr klks kllb kllc kllk klls klob kloc klok klol kloo klor klos klrc klrk klrr klrs klsc klsr kobb kobc kobk kobo kobr kobs kocb kock kocs kokb kokc kokk koko kokr koks kolb kolc kolk koll kolo kolr kols koob kooc kook kool kooo koor koos korb korc kork korl koro korr kors kos- kosb kosc koso kosr koss krbb krbk krbl krbr krcb krcc krcl krco krcs krkc krkk krko krkr krks krlc krob kroc krok krol kroo kror kros krrb krrc krrk krrl krro krrr krrs krsc krsk krsl krsr krss ksbc ksbl ksbr ksbs kscb ksck kscl ksco kscr kscs kskb kskk ksko kskr ksks kslb kslc kslk ksll kslo kslr ksob ksoc ksok ksol ksoo ksor ksos ksrb ksro ksrr ksrs kssl ksso kssr ksss lbcc lblr lbos lbrs lbsc lcbc lccc lccs lcls lcor lcrl lcrs lcsc lcsr lkrs llbs llcc llcs llks lllc llll lloc lloo lob- lobb lobo lobs locc lock loco locs lokk loko loll lolo lols loob looc look lool loor loos lork loro lors losc loso loss lrcs lroc lrrc lrrr ls-r lscb lsco lscs lsrc lsso lssr obbo obkb obls obok obol obor obos obro obsr obss ocbc occc ocks oclc ocos ocrl ocro ocrr ocrs okko oklo okok okol okor okro okso olbo olcc ollo olor olos oocr oolo oooo ooos orbb orbo orbs orco orcs orko orlo oro- orok oror oros orro orrs orsk orso oscc oscl osco oslo osoo osor osos osro ossb osso rbbb rbbr rbbs rbcl rbsl rbss rcbc rcbo rccb rccc rccs rcls rcos rcsc rcsl rcss rkos rkss rlcs rlls rob- robb robo robs rocc rock roco rocs rokk roko rokr roks rolk roll rolo roob rook rool roor roos rorc rork roro rosc roso ross rrrr rscc rscs rslc rsos rssl s-os sbbs sbcc sbcs sbor sbrk sccc sccl sccs sck- sckl scl- sclc sclk scls scob scok scol scoo scor scr- scrc scrs scsc scsl scso scsr skol skor skss slcc slob sloc sloo slos slrc slrs slsc sobo sobr sobs sock socl soco socr socs sokk soko solk soll solo solr sols sook sool soor soos sorb soro sorr sors soso soss srbc srcc sros ssbr sscc sscs sslc