dddd ddss dfds dfrf dfri didi dids didu dif- diff difs diii diis diki diku dird dirk dirr dirs dis- disd disi disk diss dius dkid drif drrs drui druk drus druu dsdr dsif dsri dsrr dssi dudd duds dudu duff dufu duid duif duir duis duki duku duri durk duru dusi dusk duur f--k ffff ffii ffrr ffss fidf fids fiff fifi fiii fiki firk firs fisd fisi fisk fiss fisu fiuk frid frik fris fsfi fssf fudd fudi fuff fufu fuid fuir fukk fuku fur- furi furr furs fusd fusi fusk fuss fusu idid idir idis idku idrf idsf idss idus ifid ifis ifrf ifri iiii iiis iirs iisd iisi iisr iisu ikid ikki ikri iksu irds irfu iri- irid iris irki irks irri irrs irsf irus isds isis iskf isku isri issf issi issr isss issu isus iuds iuiu iusd iuss k-id kddd kddf kddi kddk kddr kdfi kdfr kdis kdkd kdkk kdkr kdrf kdri kdrs kdsd kdsk kdsr kdss kdsu kdur kdus kfff kffk kfir kfis kfrd kfri kfrr kfrs kfru kfsd kfsi kfsk kfsr kidd kidi kidk kidr kids kidu kiff kifr kifs kifu kiid kiii kiik kiis kiiu kikd kikf kiki kikk kikr kiku kirf kiri kirk kirr kirs kiru kisd kisf kisi kisk kisr kiss kisu kiur kiuu kkdd kkfi kkfr kkfs kkid kkik kkkk kkrf kkrk kkrr kkrs kksd kksf kksi kksr kkss kksu kkus kkuu krdd krdr krds krdu krfd krff krfs krid krik kris krkd krki krkk krkr krks krku krrf krri krrk krrr krrs krsd krsf krsk krsr krss krsu kruf krui kruk krur ksdi ksdk ksdr ksds ksfi ksfr ksid ksif ksii ksik ksir ksis kskd kskf kskk kskr ksks ksku ksrf ksrr ksrs kssi kssr ksss kssu ksud ksui ksuu kudd kudi kudu kuff kufi kufr kuik kuki kukk kuks kuku kurd kuri kurk kurr kurs kuru kusd kusf kusu kuuk kuur kuuu rfdi rfds rfid ridd ridi rids riff rifs rifu riif riis riki rikk riku riri rirs risd risi risk riss risu rius rkkf rkss rrif rrrr rsdd rsds rsid rsis rudd rudi ruds ruff ruid ruif ruis ruki rukk ruku rurd ruri rurs ruru rusi rusk russ rusu ruud s-ii sdds sdif sdrs sdsf sdss sdsu sfdk sfss sfsu sidd sidi sidr sids siff sifr sifu siik siki sikr siks siku sirf siri sirk sirr sirs siru sisd sisi sisk siss sisu siui sius skid skif skik skir skis skiu sksd skss skud skui skur srfi sris srsd ssdd ssdf ssid ssis ssri ssrs sssf sssi ssss sudd sudi suds suf- suff sufi sufr sufs sufu suid suir suis suki suks suku sur- surd surf suri surr surs suru sus- susd susi susk suss susu suus uddi udds udid udir udsd uduk ufuk uirr uisd ukur urds urdu urff urfi urif urik uris uriu urri ursi urss ursu uruk urur urus us-k usdf usds usfi usfs usif usis ussf ussr usss ussu usui usus uuri uusi uuuu