-ous dddd ddot ddss ddts dfds dfdt dfts dod- dodd dodo dods doff dood doof doos doot doso doss dost dotd doto dots dott doud douf dous dout dsos dsst dsto dsts dtot dtss dudd dudo duds dudu duff dufu duo- duos dust duts duut fdos fdot fdst ffff ffss fftf fofo food foof foos foot foso foss fost foto fots fott foud fous fout fsfo fssf ftos fudd fuff fufu fusd fuso fuss fust fusu futo futs futu oddd odds odoo odos odot odou odso odts odtu odus off- offo offs offu ofst ofus ooff oofs oooo ooos oost oots oous osoo osos ossd osso ossu osts oto- otof otoo otos otso otsu otto otts ottu otus ouds ouff ousd oust out- outo outs ouu- s-os sdds sdot sdsf sdss sdsu sfos sfss sfsu sfts sodd sodo sods sodu sofo soft sood soof soos soot soso soss sost soto sots sotu soud souf sous sout ssdd ssdf ssot sssf ssss sstd ssts stds stfu stod stof stoo stos stot stou stsf stss sttd stud stuf stus stut sudd sudo suds suf- suff sufs sufu suos sus- susd suso suss sust susu suto sutu suus tdff tdss tfot tfsd tfss todd todo tods todt todu toff tofo toft tofu tood toof toos toot toso toss tost tosu totd toto tots tott tous tout tsos tsou tssf tsst tsts ttff ttss tttt tudu tuff tufo tuft tufu tuos tusd tuss tust tuto tuts tutt tutu tuuo udds udoo udos udot udsd udts ufos uofo usdf usdo usds usdt usfs usos ussf usss usst ussu usto usts usus utfo utto uttu uutf uuuu