iiii iiis iiit iisi iisp iist iisu iitt ipsi ipsp ipss ipts ipus iput isis isit isps issi issp isss issu isti istp ists isup isus itis itsi itsp itsu itup iuiu iupp iuss iust piip pipi pipp pips pisi piss pist pisu piti pits pitt pitu pius pppp ppps ppss ppts pptt psip psis pspi pspp psps psst psts pstu ptui puis puit puiu pupi pups pupu pusi puss pust put- puti puts putt putu s-ii siit sipi sipp sips sipt sisi siss sist sisu sit- siti sits sitt situ siui sius siut spip spis spit spps spsp spss spst spts spui spus sput ssis ssit ssps sspt sssi ssss sstp ssts stip stis stit stpp stps stsi stss stup stus stut suis suit sup- supp sups supt sus- susi susp suss sust susu suti sutu suus tiit tiiu tip- tipi tipp tips tipt tipu tisi tiss tist titi titp tits titt titu tppp tptp tput tsis tsps tspt tssi tsst tsts tsui tsup ttss tttt tuis tuit tuiu tupi tups tupu tusi tuss tust tuti tuts tutt tutu uipi uist uits upis uppp uppu upsi upup usip usis uspp usps usss usst ussu usti ustp usts usui usus utis utti uttu uusi uuuu