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ffff ffrr ffun fnuf fofo fono foof foon for- forn foro forr foun four fron frou frun fuff fufu funf fuor fur- furn furo furr nfff nfon nnnn non- nonn nono nonu noo- noon nooo noor nor- norf norn noro norr noun nour nron nuff nunn nuno nuon nurn nurr nuru off- offo offr offu ofno ofor onno onon onor onur ooff oooo orff orfu orno oro- orof oron oror orro ouff oun- our- ourn ouro ouu- roff rofo rono roof roon roor roro roru rouf roun rrrr rrun ruff rufo runf runn runo ruro ruru ruun unno unon unrf unro uofo uor- urff uro- uroo urun urur uuno uuuu

forno forro forur fouro frorn fu-fu fuorn furo- furor nnooo no-no nofor nofou nofun non-u nonno noonu noron norro norun nroff nu-nu nunon nunun nuoro nurun offof offon offun ofono oforn ofour onoff onoon onorn onour ooooo orfor ornon orono oruro ouoro ourno ro-ro rofor ronno ruffo rufo- runo- runof runon ufofu unfun unfur unnun unnur unoor unorn unrun unurn urour uuuuu

foofoo foofur forfun foufou fourof fourou funoon funrun furfur furour furrfu furuno noforn non-no nonono nonoon noonoo noonor noroff noroof nounou of-run on-off oooooo orrour ouroun ronnon ronron rounou run-on runoff unroof

foo-foo fou-fou furrour nonroof off-off onoffon run-off

forfrorn froufrou nononono

four-four frou-frou funfunfun runrunrun