n-up nnnn nnpr nnss nntn nprt npss nptn nrpn nrps nrsp nrts nsnr nsps nssp nssr nsss nstp nsts nstu ntnu ntru ntss ntsu nttr nunn nuns nunt nups nurn nurp nurr nurs nurt nuru nuss nust nusu nuts nutt nutu pnpp pntr pnup pppn pppp ppps ppru ppss pptn ppts pptt ppur prnp prps prrs prss prtp prtr prus prut pruu psnr pspp pspr psps psrp psst psts pstu puns punt punu pups pupu pur- purp purr purs puru puss pust put- puts putt putu rnnt rnsp rntp rnut rppn rpps rptn rpts rrrr rrsp rrun rsnn rsnr rsps rstp rsts rstu rtns rtps rtss rttp rtts runn runs runt rupp rupt rurp rurs ruru russ rust rusu ruts rutt rutu ruun snns snpp snrs sntr snur snus spns spps sprs spsp spss spst sptr spts spun spur spus sput srnn srps srpt srsp srtp srtr ssns ssps sspt ssrs ssss sstp ssts stnn stnr stns stpp stps strn strs stru stss sttr stun stup stur stus stut sun- sunn suns sunt sunu sup- supp supr sups supt sur- surn surp surr surs surt suru sus- susp suss sust susu sutu suus tnsp tnts tnut tppp tppr tprs tptp tptr tput trpn trpp trps trst trtr trun trus trut truu tspn tsps tspt tssr tsst tsts tsun tsup ttss tttt tunn tuns tunu tups tupu turn turp turr turs turt turu tuss tust tuts tutt tutu u-rp unns unps unrs uns- unst unts unus unut upnp uppp uppu upup urns urss ursu urts urun urup urur urus urut usnr usnu uspp usps ussr usss usst ussu ustp usts usun usus uttu uuuu