-ol bbb bbc bbd bbk bbl bbo bbs bbt bcb bcc bcd bck bcl bco bcs bct bdb bdc bdd bdk bdl bdo bds bdt bkb bkc bkk bkl bko bks bkt blb blc bld blk bll blo bls blt bob boc bod bok bol boo bos bot bsb bsc bsd bsk bsl bso bss bst btb btc btd btk btl bto bts btt c-- cbb cbc cbd cbk cbl cbo cbs cbt ccb ccc ccd cck ccl cco ccs cct cdb cdc cdd cdk cdl cdo cds cdt ckb ckc ckd cko cks ckt cl- clb clc cld clk cll clo cls clt co- cob coc cod cok col coo cos cot csb csc csd csk csl cso css cst ctb ctc ctd ctk ctl cto cts ctt dbb dbc dbd dbk dbl dbo dbs dbt dcb dcc dcd dck dcl dco dcs dct ddb ddc ddd ddk ddl ddo dds ddt dkb dkc dkk dkl dko dks dkt dl- dlb dlc dld dlk dll dlo dls dlt dob doc dod dok dol doo dos dot dsb dsc dsd dsk dsl dso dss dst dtb dtc dtd dtk dtl dto dts dtt k-t kbb kbc kbd kbk kbl kbo kbs kcb kcc kcd kck kcl kcs kct kdb kdc kdk kdl kdo kds kdt kkb kkc kkk kkl kks kkt kl- klb klc kld klo kls klt kob koc kod kok kol koo kos kot ksb ksc ksd ksk ksl kso kss kst ktb ktc ktk ktl kto kts ktt lbb lbc lbd lbk lbl lbo lbs lbt lcb lcc lcd lck lcl lco lcs lct ldb ldc ldd ldk ldl ldo lds ldt lkb lkl lks lkt llb llc lld llk lll llo lls llt lob loc lod lok lol loo los lot lsb lsc lsd lsk lsl lso lss lst ltb ltc ltd ltk ltl lto lts ltt ob- obb obc obd obk obl obo obs obt oc- ocb occ ocd ock ocl oco ocs oct odb odc odd odl odo ods odt okb okc okd okk okl oko oks olb olc old olk oll olo ols olt oo- oob ooc ood ook ool ooo oos oot os- osb osc osd osk osl oso oss ost ot- otb otc otd otk otl oto ots ott sbb sbc sbd sbk sbl sbo sbs sbt scb scc scd sck scl sco scs sct sdb sdc sdd sdk sdl sdo sds sdt sk- skb skc skd skk skl sko sks skt slb slc sld slk sll slo sls slt sob soc sod sok sol soo sos sot ss- ssb ssc ssd ssk ssl sso sss sst stb stc std stk stl sto sts stt tbb tbc tbd tbk tbl tbo tbs tbt tcb tcc tcd tck tcl tco tcs tct tdb tdc tdd tdk tdl tdo tds tdt tkb tkc tkk tkl tko tks tkt tlc tld tlk tll tlo tls tlt to- tob toc tod tok tol too tos tot tsb tsc tsd tsk tsl tso tss tst ttb ttc ttd ttk ttl tto tts ttt

bbbb bbbs bbdd bbdo bblb bbls bcbc bcbs bccc bccl bccs bcds bcos bcsc bcsl bcss bctc bcts bdbc bddc bdls bdos bdsd blbt bldc blkb blkd blls blob bloc blod blok bloo blot blss blst blts bobb bobo bobs bock boco bocs bodb bodo bods boko boks bold bolk boll bolo bols bolt boob booc bood book bool boos boot bosc bosk boso boss bost botb botd boto bots bott bsbd bscs bsdl bskt bslc bsod bsos bssc bssd bsts btcc btcl btcs btdt btob btss bttb c-bo c-cd cbbc cbbs cbcc cbcl cbcs cbct cbdb cbdc cbdo cbds cbkl cbko cblb cblc cbol cbot cbsc cbtc cbtl ccbc cccb cccc cccl cccs ccdc ccds cclc ccls ccob ccoc ccod ccsd ccsl ccss ccst cctb cctc cctl cctt cdcs cddb cddl cdls cdos cdot cdss ckbc ckck ckcl ckco ckcs ckdo ckob ckoc ckoo ckos ckot cksb cksl ckso ckst cktb ckts clcd cldc clob clod clok cloo clos clot clsc cltb cltc clts cobb cobo cobs cock coco coct codd codl cods cok- coko col- colb cold colk coll colo cols colt coob cood cook cool coos coot cosc cosl coso coss cost cotb cotc coto cots cott cscb cscc cscd cscl csco cscs csdb csks csld csob csos csot cssd cstc cstd csto csts ctbs ctls ctol ctos ctot ctsc ctss ctts d-bo dbcc dbcs dbls dbos dbss dbtt dcbc dccb dccc dccl dccs dcct dcdb dcds dcls dcos dcsc dcss dctc dcts dddd ddlc ddoc ddot ddss ddts dkdc dlbd dlco dlcs dlos dlst dobb dobl dobs dock doco docs doct dod- dodd dodo dods doko dold dolk doll dolo dols dolt doob dood dook dool doos doot dosk doso doss dost dotd dotk doto dots dott dsbc dscc dscs dsls dsos dssc dsst dstc dsto dsts dtcc dtot dtss k-lo k-os kbbb kbbc kbbd kbbk kbbl kbbo kbbs kbbt kbcb kbck kbcl kbco kbcs kbct kbdb kbdl kbdo kbds kbkb kbkk kbkl kbko kblb kbld kbll kblo kbls kblt kbob kboc kbod kbok kboo kbos kbot kbsb kbsk kbso kbss kbst kbtb kbtc kbtk kbtl kbto kbts kbtt kcbc kcbd kcbk kcbl kcbs kccb kccc kccd kcck kccl kcct kcdc kcdd kcds kckc kckk kckl kcko kclc kclk kcll kcls kclt kcob kcol kcos kcot kcsb kcsc kcsd kcss kcst kctb kctc kcto kdbb kdbl kdbs kdcc kdcd kdco kddb kddc kddd kddk kddl kdkb kdkd kdkk kdko kdkt kdlb kdlc kdld kdll kdlo kdls kdoc kdok kdot kdsc kdsd kdsk kdsl kdss kdst kdtd kkbb kkbd kkbl kkbo kkbs kkbt kkcb kkcd kkck kkcl kkco kkcs kkct kkdc kkdd kkdl kkdo kkdt kkkk kklb kklc kkld kkll kklo kkls kkob kkol kkoo kkot kksd kkss kkst kktc kktk kktl kkts klbb klbc klbd klbl klbs klbt klcb klcc klcd klck klcl klcs kldc kldd klds klkc klkk klkl klko klks kllb kllc kllk klls klob kloc klok klol kloo klos klsc klsd klst kltc kltd kltk klto