b-u bbb bbf bbo bbr bbt bbu bbx bfb bff bfo bfr bft bfu bfx bob bof boo bor bot bou box brb brf bro brr brt bru brx btb btf bto btr btt btu btx bub buf buo bur but buu bux bxb bxo bxx fbb fbf fbo fbr fbt fbu fbx fff ffo ffr fft ffu ffx fob fof foo for fot fou fox frb frf fro frr frt fru ftb ftf fto ftr ftt ftu ftx fub fuf fuo fur fut fuu fux fxr fxt fxu fxx ob- obb obf obo obr obt obu obx of- ofb off ofo ofr oft ofu ofx oo- oob oof ooo oor oot oox or- orb orf oro orr ort oru orx ot- otb otf oto otr ott otu ou- ouf ouo our out ox- oxb oxf oxo oxt oxx rbb rbf rbo rbr rbt rbu rbx rfb rff rfo rfr rft rfu rob rof roo ror rot rou rox rrb rrf rrr rrt rru rtb rtf rto rtr rtt rtu rtx rub ruf ruo rur rut ruu rux rxr t-x tbb tbf tbo tbr tbt tbu tfb tff tfo tfr tft tfu tfx to- tob tof too tor tot tou tox trb trf tro trr trt tru trx ttb ttf tto ttr ttt ttu ttx tub tuf tuo tur tut tuu tux txf txt txu ubb ubf ubo ubr ubt ubu ubx uff ufo ufr uft ufu ufx uob uoo uor uot uox ur- urb urf uro urr urt uru urx utb utf uto utr utt utu utx uur uut uuu uxb uxf uxo uxr uxt uxu xbr xbx xft xfx xof xoo xor xot xox xrf xrt xrx xtf xtr xtx xxo xxx

bbbb bbox bftt bobb bobo bobu boff bofu boob boof boor boot boox bor- borf boro borr bort boru botb boto bott bouf bour bout brfu brob broo bror brot brou brox brrr brut brux btob btor btrt bttb bubb bubo bubu buff bufo bufr bur- burb buro burr burt buru but- buto butt ffff ffrr fftf fobt fofo foof foot for- forb foro forr fort foto fott four fout foxx frob frot frou frub ftub fubb fubu fuff fufu fuor fur- furo furr furt futo futu obbo obor obot obox obro off- offo offr offu ofor ooff oooo oort ootb orbb orbo orbu orff orfu oro- orof oror orot orro orto orub oto- otof otoo otor otro otto ottu otur ouff our- ouro ourt out- outb outo ouu- oxo- oxof oxox oxuf oxxo rbbb rbbr rob- robb robo robt robu roff rofo roob roof roor root roox roro rort roru roto rotr rott roub rouf rout roux roxo rrrr rtbf rtfb rubb rubu ruff rufo ruft ruro ruru ruto rutt rutu tbox tbrb tfot tfox tobo tobt tobu toff tofo toft tofu toof toor toot torf toro torr tort toru torx toto totr tott tour tout tox- toxo toxt trfr troo trot trou trox trtr trub trut truu trux ttbb ttff tttt tubb tubo tubr tubu tuff tufo tuft tufu tuor turb turf turo turr turt turu tuto tutt tutu tuuo txtr ubbo ubtf uofo uor- urff urft uro- uroo urox urur urut utfo utor utto uttu uutf uuuu uxor xbox xoro xout xoxo xtro xuxu xxxo xxxx

bo-bo bobr boffo boort booru bootx borbo boro- boroo borot borou borox borro borut botou botox botro bottu bouto boutx boxof brobo broft broto brout brrrr bruff btr-t buffo buoux buroo burro burru burtt burut buto- butor butot butou butuo butut f-box forro forto forur fotur fourb fouro foxxx froot fruto fruux ftrtt fu-fu furbo furo- furor futur o-r-b oboro obout offof offto ofoto ofour ooooo orbot orfor orobo orout oroux ortoo oruro orutu ototo otour ottur oubut ouoro outof outro outto ro-ro robbo robo- robor robot robrt robur rofor rooft rorbu roto- rotor rotot rotox rotto roubt routt rubof rubor ruffo rufo- ruutu t-box tbtbt tbutt tobor tobot tobou toffo tofor torob torro torto tortu toto- totoo touro toxo- troff troft trott trout trubu truff truro ttttt tubo- tubof tubou tuotu turbo turbt turot turro turtu turut tutor tutto tuuru ubobo ufofu uforb uroob urour urubu urutu utro- utror uttur uturu ututo uuuuu x-box x-out xbxrx xootr xorro xotox xoxox xtort

bbbbbb booboo borbor bororo botoro boubou bourou boutob boxout brotox brotto brubru brufut brutto bububu burbot burbur burotu burutu butbro buttto buutuo buxoro foboff foofoo foofur forout forrot foufou fourof fourou fourto foxbox frbroo frobot furfur furour furrfu futuro obturb offutt oftfor oofotr oooooo orrour ottoor ouroux outbox outfor outfox outour outtro roboto rootof rotour rotout rotrou routot rubbot ruboff rubout rubro- rubutu rurutu rutour to-fro toboot tootoo torfou tororo torrox tortor tortou totoro totrot tou-fu tourou toutou toutuo toxbot trotro tuotuo turbo- turbot turtur tururu tutour tuttut u-boot utroor xoxoxo

bbbbbbb boo-boo bootout borotou bourout bourrou burtoft buttout foo-foo footrot footrub forroot fortubo fou-fou fourtou fox-fur foxboro foxtrot furrour obox-ob off-off oroboro ottrott ourboox outboob outbutt outfoot outroot ox-foot oxoboxo roofbox rootfor rootout rootrot roxboro rub-off rub-out rubbour too-too tortour tototoo touboro tro-tro trotoff trotout trubrot turbott tut-tut ububboo ufotofu xxxxxxx

bbbbbbbb bo-bo-bo borututu boutroux broubrou buruburu fourbour fox-trot foxtrott froufrou roboturb toottoot torotoro tourtour turturro ubbubboo xoxoxoxo

borborbor four-foot four-four fourxfour frou-frou tuff-tuff tuotuorou tuttototo

fourtofour outoftrout tutortrout

footforfoot

froufroututu xxxxxxxxxxxx

bbbbbbbbbbbbbbb