-ol bbb bbc bbf bbk bbl bbn bbo bbr bbt bcb bcc bcf bck bcl bcn bco bcr bct bfb bfc bff bfl bfn bfo bfr bft bkb bkc bkf bkk bkl bkn bko bkr bkt blb blc blf blk bll bln blo blr blt bnb bnc bnf bnk bnl bnn bno bnr bnt bob boc bof bok bol bon boo bor bot brb brf brk brl brn bro brr brt btb btc btf btk btl btn bto btr btt c-- cbb cbc cbf cbk cbl cbn cbo cbr cbt ccb ccc ccf cck ccl ccn cco ccr cct cfb cfc cff cfk cfl cfn cfo cfr cft ckb ckc cko ckt cl- clb clc clf clk cll cln clo clr clt cn- cnb cnc cnf cnl cnn cno cnr cnt co- cob coc cof cok col con coo cor cot crb crc crf crk crl crn cro crr crt ctb ctc ctf ctk ctl ctn cto ctr ctt fbb fbc fbf fbk fbl fbn fbo fbr fbt fcb fcc fcf fck fcl fcn fco fcr fct ffc fff ffk ffl ffn ffo ffr fft fkb fkc fkf fkk fkl fkt flb flc flf fll fln flo flr flt fnb fnc fnf fnk fnl fnn fnr fnt fob foc fof fok fol fon foo for fot frb frc frf frk frl frn fro frr frt ftb ftc ftf ftk ftl ftn fto ftr ftt k-t kbb kbc kbf kbk kbl kbn kbo kbr kcb kcc kck kcl kcn kcr kct kfc kff kfo kkb kkc kkk kkl kkn kkr kkt kl- klb klc klf klo klr klt kn- knc knf knk knl knn kno knr knt kob koc kof kok kol kon koo kor kot krc krf krk krl krn kro krr krt ktb ktc ktf ktk ktl ktn kto ktr ktt lbb lbc lbf lbk lbl lbo lbr lbt lcb lcc lcf lck lcl lcn lco lcr lct lfb lfc lff lfk lfl lfn lfo lfr lft lkb lkl lkr lkt llb llc llf llk lll lln llo llr llt lnb lnc lnk lnl lnn lno lnr lnt lob loc lof lok lol lon loo lor lot lrb lrc lrf lrk lrn lro lrr lrt ltb ltc ltf ltk ltl lto ltr ltt nbb nbc nbf nbk nbl nbn nbo nbr nbt ncb ncc ncf nck ncl ncn nco ncr nct nfb nfc nff nfk nfl nfn nfo nfr nft nkc nkf nkk nkn nko nkr nkt nlb nlc nlf nlk nll nln nlo nlr nlt nnb nnc nnf nnk nnl nnn nno nnt no- nob noc nof nok nol non noo nor not nrb nrc nrf nrk nrl nrn nro nrr nrt ntb ntc ntf ntk ntn nto ntr ntt ob- obb obc obf obk obl obn obo obr obt oc- ocb occ ocf ock ocl ocn oco ocr oct of- ofb ofc off ofl ofn ofo ofr oft okb okc okk okl oko okr olb olc olf olk oll oln olo olt on- onb onc onf onk onl onn ono onr ont oo- oob ooc oof ook ool oon ooo oor oot or- orb orc orf ork orl orn oro orr ort ot- otb otc otf otk otl otn oto otr ott rbb rbc rbf rbk rbl rbn rbo rbr rbt rcb rcc rcf rcl rcn rco rcr rct rfb rfc rff rfk rfl rfn rfo rfr rft rkb rkc rkf rkk rko rkt rlc rlf rll rln rlo rlr rlt rnb rnc rnn rno rnr rnt rob roc rof rok rol ron roo ror rot rrb rrc rrf rrk rrl rrn rrr rrt rtb rtc rtf rtk rtl rtn rto rtr rtt tbb tbc tbf tbk tbl tbn tbo tbr tbt tcb tcc tcf tck tcl tcn tco tcr tct tfb tfc tff tfk tfl tfn tfo tfr tft tkb tkc tkk tkl tko tkr tkt tlc tlf tlk tll tln tlo tlr tlt tnb tnc tnf tnk tnl tnn tno tnr tnt to- tob toc tof tok tol ton too tor tot trb trc trf trk trl trn tro trr trt ttb ttc ttf ttk ttl ttn tto ttr ttt

bbbb bbfc bbfn bblb bbrc bcbc bccc bccl bcfc bcof bcor bctc bffl bftt blbt blfc blkb blno blob bloc blok blon bloo blot blrc bnoc bnor bnrr bobb bobo bock boco boff bokn boko bolk boll boln bolo bolt bonc bonk bonn bono bont boob booc boof book bool boon boor boot bor- borf bork born boro borr bort botb botn boto bott brcb brfc brkb brno brob broc brok brol bron broo bror brot brrr brtc btcc btcl btfc btob btor btrc btrt bttb c-bo cbbc cbcc cbcl cbcn cbcr cbct cbfb cbfc cbkl cbkn cbko cbkr cblb cblc cbln cbol cbot cbrl cbrn cbrt cbtc cbtf cbtl ccbc ccbn cccb cccc cccf cccl ccfc ccff ccfl cclc ccnb ccnc ccnf ccnr ccob ccoc ccrc ccrf ccrl ccrt cctb cctc cctl cctt cfbc cfbn cfbr cfbt cfcb cfcf cfcl cfcn cfco cffb cffr cfln cfnb cfnr cfor cfrb cfrn cfrt cftc cftk cftl cftr ckbc ckck ckcl ckco ckfr cklf ckln cknb cknc cknt ckob ckoc ckoo ckor ckot ckrc cktb clob clof clok clon cloo clor clot clro cltb cltc cnbc cnbl cnco cnrc cnrr cnrt cntc cntf cntk cntr cobb cobo cock coco coct cofc coff coft cok- coko col- colb colk coll coln colo colt con- conc conf conk conn cono cont coob coof cook cool coon coot cor- corb corc corf cork corl corn coro corr cort cotb cotc cotn coto cott crbc crcc crcr crfc crfl crkc crkl crlf crob croc crok crol cron croo cror crot crrt crtc crtf crtl ctcf ctfc ctfo ctol ctor ctot ctrc ctrl ctrn cttn f--k fccf fcnl fcot fcto ffcc ffff ffrr fftf flcl flnb flnc flob floc flok flon floo flor flot fltk fnlc fntb fobt fock foco fofo folc folk foll folo folr folt fono font foof fook fool foon foot for- forb fork forl forn foro forr fort