iiii iiis iiit iirs iisi iisp iisr iist iisu iitr iitt inis init inni innr inns innu inp- inpi inpp inpt inri inrs insp inss inst insu inti intn intp intr ints intu inui inun inup inus ipin ippr ipri ipsi ipsp ipss ipts ipur ipus iput iri- irin irip iris irps irri irrs irsp irti irtp irts irun irus isin isis isit isnt ispr isps isri isrp issi issp issr isss issu isti istp istr ists isup isus itin itis itri itrs itsi itsp itsu itup itur iuiu iupp iuss iust n-ii n-up niip niir niit niiu nini nins nipr nips nipt nirs nirt niru nisi nisp niss nist nisu niti nitr nits niur nnit nnnn nnpi nnpr nnss nntn npin npri nprt npss nptn nrpn nrps nrsp nrts nsin nsis nsnr nspi nsps nssp nssr nsss nstp nsts nstu ntis ntnu ntru ntss ntsu nttr ntui nuin nuit nunn nuns nunt nups nuri nurn nurp nurr nurs nurt nuru nusi nuss nust nusu nuts nutt nutu piip pini pinn pinp pins pint pinu pipi pipp pips piri pirn pirr pirs piru pisi piss pist pisu piti pitr pits pitt pitu pius pnin pnpp pntr pnup pppn pppp ppps ppru ppss pptn ppts pptt ppur pri- prii prin pris prnp prps prri prrs prsi prss prti prtp prtr prus prut pruu psip psis psni psnr pspi pspp pspr psps psrp psst psts pstu ptui puin puir puis puit puiu puns punt punu pupi pups pupu pur- puri purp purr purs puru pusi puss pust put- puti puts putt putu riin riis rinn ripi ripp ripr rips ript riri rirs risi risp riss rist risu riti rits ritt ritu rius rnin rnnt rnsp rntp rnut rpii rppn rpps rptn rpts rrrr rrsp rrun rsis rsnn rsnr rsps rstp rsts rstu rtns rtps rtss rttp rtts ruin ruis ruit runi runn runs runt rupp rupt ruri rurp rurs ruru rusi russ rust rusu ruti ruts rutt rutu ruun s-ii siit sini sinn sinp sins sint sinu sipi sipp sips sipt siri sirp sirr sirs sirt siru sisi siss sist sisu sit- siti sitn sits sitt situ siui sius siut snip snir snit snns snpp snrs sntr snur snus spin spip spir spis spit spns spps spri sprs spsp spss spst sptr spts spui spun spur spus sput sris srni srnn srps srpt srsp srtp srtr ssin ssis ssit ssns ssps sspt ssri ssrs sssi ssss sstp ssts stip stir stis stit stnn stnr stns stpp stps stri strn strs stru stsi stss sttr stun stup stur stus stut suin suir suis suit sun- suni sunn suns sunt sunu sup- supp supr sups supt sur- suri surn surp surr surs surt suru sus- susi susp suss sust susu suti sutu suus tiit tiiu tini tinn tins tint tinu tip- tipi tipp tips tipt tipu tiri tirr tirs tiru tisi tiss tist titi titp tits titt titu tnsp tnts tnut tpir tppp tppr tprs tptp tptr tput tri- trin trip tris trit trpn trpp trps trsi trst trtr trun trus trut truu tsin tsis tspn tsps tspt tssi tssr tsst tsts tsui tsun tsup ttss tttt tuin tuis tuit tuiu tuni tunn tuns tunu tupi tups tupu turi turn turp turr turs turt turu tusi tuss tust tuti tuts tutt tutu u-rp uint uipi uirr uist uits uni- unii unin unir unis unit unni unns unps unrs uns- unst unts unus unut upin upis upnp uppp uppu upri upsi upup urin uris uriu urni urns urri ursi urss ursu urts urun urup urur urus urut usin usip usis usnr usnu uspp usps ussr usss usst ussu usti ustp usts usui usun usus utin utis utri utti uttu uuni uuri uusi uuuu