fff ffo ffr fft ffu fof foo for fot fou frf fro frr frt fru ftf fto ftr ftt ftu fuf fuo fur fut fuu of- off ofo ofr oft ofu oo- oof ooo oor oot or- orf oro orr ort oru ot- otf oto otr ott otu ou- ouf ouo our out rff rfo rfr rft rfu rof roo ror rot rou rrf rrr rrt rru rtf rto rtr rtt rtu ruf ruo rur rut ruu tff tfo tfr tft tfu to- tof too tor tot tou trf tro trr trt tru ttf tto ttr ttt ttu tuf tuo tur tut tuu uff ufo ufr uft ufu uoo uor uot ur- urf uro urr urt uru utf uto utr utt utu uur uut uuu

ffff ffrr fftf fofo foof foot for- foro forr fort foto fott four fout frot frou fuff fufu fuor fur- furo furr furt futo futu off- offo offr offu ofor ooff oooo oort orff orfu oro- orof oror orot orro orto oto- otof otoo otor otro otto ottu otur ouff our- ouro ourt out- outo ouu- roff rofo roof roor root roro rort roru roto rotr rott rouf rout rrrr ruff rufo ruft ruro ruru ruto rutt rutu tfot toff tofo toft tofu toof toor toot torf toro torr tort toru toto totr tott tour tout trfr troo trot trou trtr trut truu ttff tttt tuff tufo tuft tufu tuor turf turo turr turt turu tuto tutt tutu tuuo uofo uor- urff urft uro- uroo urur urut utfo utor utto uttu uutf uuuu

forro forto forur fotur fouro froot fruto ftrtt fu-fu furo- furor futur offof offto ofoto ofour ooooo orfor orout ortoo oruro orutu ototo otour ottur ouoro outof outro outto ro-ro rofor rooft roto- rotor rotot rotto routt ruffo rufo- ruutu toffo tofor torro torto tortu toto- totoo touro troff troft trott trout truff truro ttttt tuotu turot turro turtu turut tutor tutto tuuru ufofu urour urutu utro- utror uttur uturu ututo uuuuu

foofoo foofur forout forrot foufou fourof fourou fourto furfur furour furrfu futuro offutt oftfor oofotr oooooo orrour ottoor outfor outour outtro rootof rotour rotout rotrou routot rurutu rutour to-fro tootoo torfou tororo tortor tortou totoro totrot tou-fu tourou toutou toutuo trotro tuotuo turtur tururu tutour tuttut utroor

foo-foo footrot forroot fou-fou fourtou furrour off-off ottrott outfoot outroot rootfor rootout rootrot too-too tortour tototoo tro-tro trotoff trotout tut-tut ufotofu

froufrou toottoot torotoro tourtour turturro

four-foot four-four frou-frou tuff-tuff tuotuorou tuttototo

fourtofour tutortrout

footforfoot

froufroututu