-er bbb bbe bbf bbk bbo bbr bbx be- beb bee bef bek beo ber bex bfb bfe bff bfo bfr bfx bkb bke bkf bkk bko bkr bkx bob boe bof bok boo bor box brb bre brf brk bro brr brx bxb bxo bxx ebb ebe ebf ebk ebo ebr ebx eeb eee eef eek eeo eer eex ef- efb efe eff efo efr efx ekb eke ekf eko ekr eo- eob eoe eof eok eoo eor erb ere erf erk ero err ex- exe exo exr exx fbb fbe fbf fbk fbo fbr fbx feb fee fef fek feo fer fex ffe fff ffk ffo ffr ffx fkb fkf fkk fob foe fof fok foo for fox frb fre frf frk fro frr fxe fxr fxx kbb kbe kbf kbk kbo kbr kbx ke- keb kee kef kek keo ker kex kff kfo kfx kkb kke kkk kkr kob koe kof kok koo kor krf krk kro krr kxo ob- obb obe obf obk obo obr obx oeb oee oef oeo oer oex of- ofb ofe off ofo ofr ofx okb oke okk oko okr oo- oob oof ook ooo oor oox or- orb ore orf ork oro orr orx ox- oxb oxf oxo oxx rbb rbe rbf rbk rbo rbr rbx re- reb ree ref rek reo rer rex rfb rfe rff rfk rfo rfr rkb rke rkf rkk rko rob roe rof rok roo ror rox rrb rrf rrk rrr rxr xbe xbr xbx xee xer xex xfe xfx xkb xke xof xok xoo xor xox xrf xrx xxo xxx

bbbb bbeb bbox bebb bebe bebo beeb beef beek beer befe beff befo beke beko beo- beof beok beor bere berk bero berr bobb bobe bobo boee boef boeo boer bofe boff boke boko boob booe boof book boor boox bor- bore borf bork boro borr breb bree bref brek breo brer brex brkb brob broe brok broo bror brox brrr ebbo ebbr eber eboe eboo ebor ebox ebro eeee eefe eeke eero efbr efeo efke efor ekeb ekek eker eore er-x erbb erbe ereb erer erfx erke erob eroe eroo erre erro exer exfo exo- exor exrx f--k febo feeb feek feer fefe feff fefo feke feko feof ferb fere ferk fero ferr ffee ffff ffrr foer fofo foke foof fook for- forb fore fork foro forr foxe foxx free freo frex frob froe kbbb kbbe kbbf kbbk kbbo kbbr kbeb kbee kbef kbek kbeo kber kbex kbfb kbff kbfk kbfo kbfr kbfx kbkb kbkf kbkk kbko kbkr kbob kboe kbok kboo kbox kbrb kbre kbrf kbrk kbro kbrx kbxb kbxr kbxx kebb kebe kebr keef keek keer kefb keff kefr kefx kekb keke keko keok ker- kerb kere kerf kerk kero kerr kerx kexb kexo kexx kfbk kfbx kfeb kfer kffb kfff kffk kffx kfkb kfkx kfok kfoo kfor kfox kfre kfro kfrr kfrx kfxe kfxf kfxr kfxx kkbb kkbe kkbo kkbr kkex kkfr kkkk kkob kkoo kkor kkrb kkre kkrf kkrk kkro kkrr kkrx kkxk kkxx kobb kobe kobk kobo kobr kofe koff kofk kofo kofx kokb koke kokf kokk koko kokr kokx koob kook kooo koor korb kore korf kork koro korr koxe koxr krbb krbe krbk krbr krbx kreb kree kref krek kreo krex krfe krff krfo krfx krke krkk krko krkr krkx krob kroe krof krok kroo kror krox krrb krre krrf krrk krro krrr krrx krxb krxf krxk krxo krxr krxx kxbr kxbx kxeo kxex kxff kxkk kxkx kxok kxoo kxor kxox kxrb kxre kxrk kxro kxrr kxrx kxxe kxxf kxxk kxxo kxxr kxxx o-eo obbo ober obex obkb oboe obok obor obox obre obro oere ofek ofer off- offe offo offr ofor ofre oker okko okok okor okre okro oobe ooer ooff oooo oore orbb orbe orbo ore- oreb orek oreo orer orex orfe orff orke orko oro- oroe orof orok oror orro oxer oxo- oxof oxox oxxo rbbb rbbr rebb rebe rebk rebo reeb reef reek refe reff refr reke reko reof rere rero rexx rfef rkkf rob- robb robe robo roer rofe roff rofo roke rokk roko rokr roob roof rook roor roox rore rork roro roxo rrrr xbee xbox xeer xefe xeko xer- xero xexe xfer xoro xoxo xxxo xxxx

b-r-k bbbee bbook be-er be-ro bebek beber bebox beebe beeke beffe befoe befor beker bekke bekko bekok beofe beoff berbe berek berk- berke berko berob beroe berok beror berre bo-bo bobek bobko bobok bobr bobre boeke boero boffo bokeo boker bokko bokok bokor booer booke booko boore borbo boree borek borer borex borko boro- borok boroo borox borre borro boxbe boxee boxer boxof bre-x breef breek breer breke breo- brere brobo broek broer broke brook brrrr bxkbf e-box ebber ebeko ebook eeeee efere effer efore ekeko ekker eofor eorre erbbe erber erere erkko eroor erore error exorb exore f-box febre feeor feere fefor feoff ferox ferr- ferre ferro fokke foore fore- foreo forex forro foxer foxxx freek freer freex freke frere frobe frore k-box k-rob kebbe kebek keber kebob keefe keere kefee kerek kerre kkbox ko-ko kobee kober koker kokko kokor kokre korbe korbo korek korff korke koror korro kre-o kreef kreek kreke kreo- kroke o-fer o-r-b oboro obreb obrok offek offer offof offre okeke okere okker okobo okoro oo-er ooooo oreo- orere orero orexo orfeo orfoe orfor orobe orobo oroer oroke rebbe reber rebox reefe reere refer reffe reffo rekke reorx rere- reree rerob rexer ro-ro robbe robbo rober robo- robor roero roffe rofor rokee roker rokke rokkk rooer roofe rooke roore rorer rorke x-box xbxrx xerbo xero- xerox xexex xorro xoxox

bbbbbb bebook beebee beefer beeker before befree bekker bekoor bekoro berbee berbeo berber bereke bereko berere berker berrer bobber bobeke bobrek bobrok boeber boerre bokere bokoro boober booboo booker bookof borbor borfee boroko borore bororo breefe breere breffo brekke broker brokke brokkr brooke e-book eebree efexor effere effoff effore ekero erbree feeror feofor ferber ferfer feroke ferrer ferrex ferro- foboff foerre fokker foofoo fooker forfex forker forrer foxbox frbroo freebo freeof