-ous dddd ddss dfds dfrf dod- dodd dodo dods doff dood doof door doos dord dorf doro dorr dors doru doso doss doud douf dour dous drod drof drou drrs drus druu dsdr dsos dsrr dudd dudo duds dudu duff dufu duo- duos duro duru duur fdos ffff ffrr ffss fofo food foof foos for- ford foro forr fors foso foss foud four fous fros frou frso fsfo fssf fudd fuff fufu fuor fur- furo furr furs fusd fuso fuss fusu oddd odds odoo odor odos odou odso odur odus ofdr off- offo offr offs offu ofor ofus ooff oofs oooo ooos oord oous ordo ords ordu orff orfs orfu oro- orof oror oros orro orrs orso orsu orus osoo osor osos osrd osro ossd osso ossu ouds ouff our- ouro ours ousd ouu- rdos rdso rfds rodd rodo rods roff rofo rood roof roor roos roro roru roso ross roud rouf rous rrrr rsdd rsds rsos rudd rudo ruds ruff rufo rurd ruro rurs ruru ruso russ rusu ruud s-os sdds sdrs sdsf sdss sdsu sfor sfos sfro sfss sfsu sodd sodo sods sodu sofo sood soof soor soos sord soro sorr sors soru soso soss soud souf sour sous sros srsd ssdd ssdf ssrs sssf ssss sudd sudo suds suf- suff sufr sufs sufu suor suos sur- surd surf suro surr surs suru sus- susd suso suss susu suus udds udoo udos udsd ufos uofo uor- urds urdu urff uro- uroo urso urss ursu urur urus usdf usdo usds usfs usos ussf ussr usss ussu usus uuuu