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pppp ppps ppru ppss ppur prps prrs prss prsv prus pruu pspp pspr psps psrp pups pupu pur- purp purr purs puru puss rpps rrrr rrsp rsps rsvp rupp rurp rurs ruru russ rusu ruvu rvsp spps sprs spsp spss spur spus srps srsp ssps ssrs ssss ssvp sup- supp supr sups supv sur- surp surr surs suru surv sus- susp suss susu suus suvs u-rp uppp uppu upup urss ursu urup urur urus uspp usps ussr usss ussu usus uuuu uvvu vsrp vups vurp vvvv

pruss purrs purus puurs rrsps rsvps spurr spurs sssss supps supur supvr surpu surur surus susus ursus usurp uuuuu vurps

pppppp ppsspp purpur russus srprss susurr uruppu usurps vvvvvv

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sussurus susurrus