dddd ddps ddss ddts didi dids didu diii diis dipp dips dipt dipu dird dirr dirs dirt dis- disd disi disp diss dist diti dits ditt dius dpdt dpsd dpst dpsu dpts drip drit drrs drsp drui drup drus drut druu dsdp dsdr dsip dsps dspt dsri dsrp dsrr dssi dssp dsst dsts dtdp dtss dttp dudd duds dudu duid duir duis duit duri durt duru dusi dust dutp duts duur duut idid idir idis idps idss idtp idts idus iiii iiis iiit iirs iisd iisi iisp iisr iist iisu iitr iitt ipdi ipid ippr ipri ipsi ipsp ipss ipts ipur ipus iput irdp irds iri- irid irip iris irps irri irrs irsp irti irtp irts irus isds isis isit ispr isps isri isrp issi issp issr isss issu istd isti istp istr ists isup isus itis itri itrs itsi itsp itsu itup itur iuds iuiu iupp iusd iuss iust pdpr pdrs pdsd pdss pids piip pipi pipp pips piri pirr pirs piru pisd pisi piss pist pisu piti pitr pits pitt pitu pius ppds ppid pppd pppp ppps ppru ppss ppts pptt ppur pri- prid prii pris prpd prps prrd prri prrs prsd prsi prss prti prtp prtr prud prus prut pruu psdi psdp psdr psds psid psip psis pspi pspp pspr psps psrd psrp psst psts pstu ptpd ptrd ptsd ptui puds pudu puid puir puis puit puiu pupi pups pupu pur- puri purp purr purs puru pusd pusi puss pust put- puti puts putt putu ridd ridi rids riis ripd ripi ripp ripr rips ript riri rirs risd risi risp riss rist risu riti rits ritt ritu rius rpdp rpii rpps rptd rpts rrrr rrsp rsdd rsds rsid rsis rsps rstp rsts rstu rtdt rtps rtss rttp rtts rudd rudi rudp ruds ruid ruis ruit rupp rupt rurd ruri rurp rurs ruru rusi russ rust rusu ruti ruts rutt rutu ruud s-ii sdds sdpr sdps sdrs sdss sdsu sidd sidi sidr sids siit sipi sipp sips sipt siri sirp sirr sirs sirt siru sisd sisi siss sist sisu sit- sitd siti sits sitt situ siui sius siut spdp spdr spdt spip spir spis spit sppd spps sprd spri sprs spsd spsp spss spst sptr spts spud spui spur spus sput sris srps srpt srsd srsp srtp srtr ssdd ssdp ssid ssis ssit ssps sspt ssri ssrs sssi ssss sstd sstp ssts stds stid stip stir stis stit stpd stpp stps strd stri strs stru stsi stss sttd sttr stud stup stur stus stut sudd sudi suds suid suir suis suit sup- supp supr sups supt sur- surd suri surp surr surs surt suru sus- susd susi susp suss sust susu suti sutu suus tdis tdri tdss tidd tids tiit tiiu tip- tipi tipp tips tipt tipu tird tiri tirr tirs tiru tisi tiss tist titi titp tits titt titu tpdu tpir tppd tppp tppr tprs tptp tptr tput tri- trip tris trit trpp trps trsd trsi trst trtr trud trus trut truu tsid tsis tsps tspt tssi tssr tsst tsts tsui tsup ttss tttt tudi tudu tuis tuit tuiu tupi tups tupu turd turi turp turr turs turt turu tusd tusi tuss tust tuti tuts tutt tutu u-rp uddi udds udid udir udpd udsd udts uipi uirr uisd uist uits upis uppp uppu upri upsi upup urds urdu uris uriu urri ursi urss ursu urts urup urur urus urut usdp usds usdt usip usis uspp usps ussr usss usst ussu usti ustp usts usui usus utid utis utpd utri utti uttu uuri uusi uuuu