llll llps lppl lprp lpss lrps lrpu lrrr lrst lrts ls-r lspl lspr lssp lssr lsts ltps ltrs ltsp ltsr lttr lull lulu lupu lurs lurt luss lust luts luup plpp plss pltt plup plur plus pppp ppps ppru ppss ppts pptt ppur prlr prls prps prrs prsl prss prtp prtr prus prut pruu pspp pspr psps psrp psst psts pstu pull pulp puls pult pulu pupl pups pupu pur- purl purp purr purs puru puss pust put- puts putt putu rlls rpls rpps rpts rrrr rrsp rslp rsps rssl rstp rsts rstu rtls rtlt rtps rtss rttp rtts rull rupp rupt rurp rurs ruru russ rust rusu rutl ruts rutt rutu sllp slpp slps slrp slrs slst slsu slts slup slur slut splp splr spls spps sprs spsp spss spst sptr spts spur spus sput srps srpt srsp srtp srtr sslp sslt sspl ssps sspt ssrl ssrs ssss sstl sstp ssts stlt stpp stps strs stru stss sttr stul stup stur stus stut sul- sull sulp sult sulu sup- supp supr sups supt sur- surp surr surs surt suru sus- susp suss sust susu sutu suus tlrs tpls tppp tppr tprs tptp tptr tput trpp trps trst trtr trus trut truu tsps tspt tssr tsst tsts tsup ttss tttt ttul tull tulp tulu tups tupu turp turr turs turt turu tuss tust tutl tuts tutt tutu u-rp ullr ults ultt ulul ulus uppp uppu uptl upup urls urss ursu urts urup urur urus urut uslp uslu uspp usps ussr usss usst ussu ustp usts usul usus utsl uttu uulu uuuu