-ous dddd ddss dfds dfrf dfri didi dido dids didu dif- diff difs diii diis dior dios diou dird dirr dirs dis- disd disi diso diss dius dod- dodd dodi dodo dods doff doid dois dood doof door doos dord dorf dori doro dorr dors doru dosi doso doss doud douf dour dous drif drod drof drou drrs drui drus druu dsdr dsif dsos dsri dsrr dssi dudd dudo duds dudu duff dufu duid duif duir duis duo- duos duri duro duru dusi duur fdos ffff ffii ffrr ffss fidf fido fids fiff fifi fifo fiii fior fios firs fisd fisi fiss fisu fofo foid fois food foof foos for- ford fori foro forr fors fosi foso foss foud four fous frid frio fris fros frou frso fsfi fsfo fssf fudd fudi fuff fufu fuid fuir fuor fur- furi furo furr furs fusd fusi fuso fuss fusu iddo idid idio idir idis idos idrf idro idsf idso idss iduo idus ifid ifis ifor ifrf ifri ifso iiii iiio iiis iioi iioo iios iirs iisd iisi iisr iisu iod- iodd iodo ioii ioio ioof iooi iooo ioos iori iors ioso iosu ious irdo irds irfu iri- irid irio iris irod irri irrs irsf irus isds isis iso- isof isor isos isri issf issi isso issr isss issu isus iuds iuiu iusd iuss oddd oddi odds odio odir odis odiu odoo odor odos odou odso odur odus ofdr off- offo offr offs offu ofid ofor ofus oido oids oiii oios oisd oisu oodi ooff oofs ooid oooo ooos oord oosi oous ordo ords ordu orff orfi orfs orfu ori- orid orif orio oris oro- orof oror oros orri orro orrs orsi orso orsu orus osdi osii osis osoi osoo osor osos osrd osro ossd ossi osso ossu ouds ouff ouii ouir ouis our- ouro ours ousd ouu- rdio rdos rdso rfdi rfds rfid ridd ridi rido rids riff rifs rifu riif riis rios riou riri rirs risd risi riso riss risu rius rodd rodi rodo rods roff rofo roid roif roio roir rois roiu rood roof rooi roor roos rori roro roru rosi roso ross roud rouf rous rrif rrrr rsdd rsds rsid rsis rsos rudd rudi rudo ruds ruff rufo ruid ruif ruis rurd ruri ruro rurs ruru rusi ruso russ rusu ruud s-ii s-os sdds sdif sdio sdrs sdsf sdss sdsu sfio sfor sfos sfro sfss sfsu sidd sidi sido sidr sids siff sifo sifr sifu siod sior sios siou sirf siri siro sirr sirs siru sisd sisi siss sisu siui sius sodd sodo sods sodu sofi sofo soif soir sois sood soof soor soos sord sori soro sorr sors soru sosi soso soss soud souf sour sous srfi sris sros srsd ssdd ssdf ssid ssis ssri ssrs sssf sssi ssss sudd sudi sudo suds suf- suff sufi sufr sufs sufu suid suio suir suis suor suos sur- surd surf suri suro surr surs suru sus- susd susi suso suss susu suus uddi udds udid udir udoo udos udsd ufos uirr uisd uofo uor- urds urdu urff urfi urif uris uriu uro- uroo urri ursi urso urss ursu urur urus usdf usdo usds usfi usfs usif usis usoi usos ussf ussr usss ussu usui usus uuri uusi uuuu