pppp ppps ppru ppss ppts pptt ppur prps prrs prss prtp prtr prus prut pruu prys pspp pspr psps psrp psst psts pstu psy- psys pups pupu pupy pur- purp purr purs puru pury puss pust put- puts putt putu puy- puys puyt pypy pyr- pyry pyss pyst pytt rpps rpts rrrr rrsp rsps rstp rsts rstu rtps rtss rttp rtts rupp rupt rupy rurp rurs ruru russ rust rusu rusy ruts rutt rutu ruty ruys rysy rytt ryyt spps sprs spry spsp spss spst sptr spts spur spus sput spy- spyr spys srps srpt srsp srtp srtr ssps sspt ssrs ssss sstp ssts stpp stps strs stru stry stss sttr stup stur stus stut stuy styr stys sup- supp supr sups supt supy sur- surp surr surs surt suru sury sus- susp suss sust susu susy sutu suty suus suyr suyu syrs syrt syry syss syst sytt tppp tppr tprs tptp tptr tput trpp trps trst trtr trus trut truu try- tryp trys tsps tspt tssr tsst tsts tsup tsys ttss tttt ttys tups tupu tupy turp turr turs turt turu tury tuss tust tuts tutt tutu tuty tuys typ- typp typy tyr- tyrr tyss tyst tytt tyty tyup tyus u-rp uppp uppu uppy upsy upup urry urss ursu ursy urts urup urur urus urut uspp usps ussr usss usst ussu ussy ustp usts usus uttu uuuu uyts yput yssu yups yurt yury yust yutu yuty yuyu yyyy