-ol bbb bbc bbf bbk bbl bbn bbo bbr bbs bbt bcb bcc bcf bck bcl bcn bco bcr bcs bct bfb bfc bff bfl bfn bfo bfr bfs bft bkb bkc bkf bkk bkl bkn bko bkr bks bkt blb blc blf blk bll bln blo blr bls blt bnb bnc bnf bnk bnl bnn bno bnr bns bnt bob boc bof bok bol bon boo bor bos bot brb brf brk brl brn bro brr brs brt bsb bsc bsf bsk bsl bsn bso bsr bss bst btb btc btf btk btl btn bto btr bts btt c-- cbb cbc cbf cbk cbl cbn cbo cbr cbs cbt ccb ccc ccf cck ccl ccn cco ccr ccs cct cfb cfc cff cfk cfl cfn cfo cfr cfs cft ckb ckc cko cks ckt cl- clb clc clf clk cll cln clo clr cls clt cn- cnb cnc cnf cnl cnn cno cnr cns cnt co- cob coc cof cok col con coo cor cos cot crb crc crf crk crl crn cro crr crs crt csb csc csf csk csl csn cso csr css cst ctb ctc ctf ctk ctl ctn cto ctr cts ctt fbb fbc fbf fbk fbl fbn fbo fbr fbs fbt fcb fcc fcf fck fcl fcn fco fcr fcs fct ffc fff ffk ffl ffn ffo ffr ffs fft fkb fkc fkf fkk fkl fkt flb flc flf fll fln flo flr fls flt fnb fnc fnf fnk fnl fnn fnr fns fnt fob foc fof fok fol fon foo for fos fot frb frc frf frk frl frn fro frr frs frt fsb fsc fsf fsk fsl fsn fso fsr fss fst ftb ftc ftf ftk ftl ftn fto ftr fts ftt k-t kbb kbc kbf kbk kbl kbn kbo kbr kbs kcb kcc kck kcl kcn kcr kcs kct kfc kff kfo kfs kkb kkc kkk kkl kkn kkr kks kkt kl- klb klc klf klo klr kls klt kn- knc knf knk knl knn kno knr knt kob koc kof kok kol kon koo kor kos kot krc krf krk krl krn kro krr krs krt ksb ksc ksf ksk ksl ksn kso ksr kss kst ktb ktc ktf ktk ktl ktn kto ktr kts ktt lbb lbc lbf lbk lbl lbo lbr lbs lbt lcb lcc lcf lck lcl lcn lco lcr lcs lct lfb lfc lff lfk lfl lfn lfo lfr lfs lft lkb lkl lkr lks lkt llb llc llf llk lll lln llo llr lls llt lnb lnc lnk lnl lnn lno lnr lns lnt lob loc lof lok lol lon loo lor los lot lrb lrc lrf lrk lrn lro lrr lrs lrt lsb lsc lsf lsk lsl lsn lso lsr lss lst ltb ltc ltf ltk ltl lto ltr lts ltt nbb nbc nbf nbk nbl nbn nbo nbr nbs nbt ncb ncc ncf nck ncl ncn nco ncr ncs nct nfb nfc nff nfk nfl nfn nfo nfr nfs nft nkc nkf nkk nkn nko nkr nks nkt nlb nlc nlf nlk nll nln nlo nlr nls nlt nnb nnc nnf nnk nnl nnn nno nns nnt no- nob noc nof nok nol non noo nor nos not nrb nrc nrf nrk nrl nrn nro nrr nrs nrt nsb nsc nsf nsk nsl nsn nso nsr nss nst ntb ntc ntf ntk ntn nto ntr nts ntt ob- obb obc obf obk obl obn obo obr obs obt oc- ocb occ ocf ock ocl ocn oco ocr ocs oct of- ofb ofc off ofl ofn ofo ofr ofs oft okb okc okk okl oko okr oks olb olc olf olk oll oln olo ols olt on- onb onc onf onk onl onn ono onr ons ont oo- oob ooc oof ook ool oon ooo oor oos oot or- orb orc orf ork orl orn oro orr ors ort os- osb osc osf osk osl osn oso osr oss ost ot- otb otc otf otk otl otn oto otr ots ott rbb rbc rbf rbk rbl rbn rbo rbr rbs rbt rcb rcc rcf rcl rcn rco rcr rcs rct rfb rfc rff rfk rfl rfn rfo rfr rfs rft rkb rkc rkf rkk rko rks rkt rlc rlf rll rln rlo rlr rls rlt rnb rnc rnn rno rnr rns rnt rob roc rof rok rol ron roo ror ros rot rrb rrc rrf rrk rrl rrn rrr rrs rrt rsb rsc rsf rsk rsl rsn rso rsr rss rst rtb rtc rtf rtk rtl rtn rto rtr rts rtt sbb sbc sbf sbk sbl sbn sbo sbr sbs sbt scb scc scf sck scl scn sco scr scs sct sfb sfc sff sfk sfl sfn sfo sfr sfs sft sk- skb skc skf skk skl sko skr sks skt slb slc slf slk sll sln slo slr sls slt snb snc snf snk snl snn sno snr sns snt sob soc sof sok sol son soo sor sos sot sr- srb src srf srk srl srn sro srr srs srt ss- ssb ssc ssf ssk ssl ssn sso ssr sss sst stb stc stf stk stl stn sto str sts stt tbb tbc tbf tbk tbl tbn tbo tbr tbs tbt tcb tcc tcf tck tcl tcn tco tcr tcs tct tfb tfc tff tfk tfl tfn tfo tfr tfs tft tkb tkc tkk tkl tko tkr tks tkt tlc tlf tlk tll tln tlo tlr tls tlt tnb tnc tnf tnk tnl tnn tno tnr tns tnt to- tob toc tof tok tol ton too tor tos tot trb trc trf trk trl trn tro trr trs trt tsb tsc tsf tsk tsl tsn tso tsr tss tst ttb ttc ttf ttk ttl ttn tto ttr tts ttt

bbbb bbbs bbfc bbfn bblb bbls bbrc bcbc bcbs bccc bccl bccs bcfc bcof bcor bcos bcrs bcsc bcsl bcsn bcss bctc bcts bfcs bffl bffs bfsr bfts bftt blbt blfc blkb blls blno blob bloc blok blon bloo blot blrc blss blst