-ous ffff ffrr ffss ffun fnrs fnuf fofo fono fons foof foon foos for- forn foro forr fors foso foss foun four fous frns fron fros frou frso frun fsfo fssf fuff fufu funf funs fuor fur- furn furo furr furs fuso fuss fusu nfff nfon nfrs nfsr nfsu nnnn nnos nnss non- nonn nono nons nonu noo- noon nooo noor noos nor- norf norn noro norr nors nos- noss nosu noun nour nous nron nsfs nsnr nsof nsos nsou nssf nsso nssr nsss nuff nunn nuno nuns nuon nurn nurr nurs nuru nuss nusu off- offo offr offs offu ofno ofor ofus onno onon onor onos onso onur onus ooff oofs oons oooo ooos oous orff orfs orfu orno orns oro- orof oron oror oros orro orrs orso orsu orus osno osnr osoo osor osos osro osso ossu osun ouff oun- our- ourn ouro ours ouu- roff rofo rono rons roof roon roor roos roro roru roso ross rouf roun rous rrrr rrun rsnn rsno rsnr rsos ruff rufo runf runn runo runs ruro rurs ruru ruso russ rusu ruun s-os sfor sfos sfro sfss sfsu snfu snns snoo snor snos snrs snur snus sofo son- sono sons sonu soof soon soor soos sorn soro sorr sors soru soso soss souf soun sour sous srnn srno sros ssns ssrs sssf ssss suf- suff sufr sufs sufu sun- sunn suno suns sunu suor suos sur- surf surn suro surr surs suru sus- suso suss susu suus ufos unno unns unon unos unrf unro unrs uns- unso unus uofo uor- urff urns uro- uroo urso urss ursu urun urur urus usfs usno usnr usnu usos ussf ussr usss ussu usun usus uuno uuuu