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

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

pppppp ppsspp purpur russus srprss susurr uruppu usurps

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sussurus susurrus