iiii iiis iiit iirs iisi iisp iisr iist iitr iitt iiwi ippr ipri ipsi ipsp ipss ipsw ipts iri- irip iris irps irri irrs irsp irti irtp irts isis isit ispr isps ispw isri isrp issi issp issr isss isti istp istr ists itis itri itrs itsi itsp iwis iwiw iwpr iwps piip pipi pipp pips piri pirr pirs pisi piss pist piti pitr pits pitt piwi pppp ppps ppss ppts pptt pri- prii pris prps prri prrs prsi prss prti prtp prtr psip psis pspi pspp pspr psps psrp psst psts pwts riis ripi ripp ripr rips ript riri rirs risi risp riss rist riti rits ritt rpii rpps rpts rrrr rrsp rsis rsps rstp rsts rtps rtss rttp rtts s-ii siit sipi sipp sips sipt siri sirp sirr sirs sirt sisi siss sist sit- siti sits sitt siwi spip spir spis spit spps spri sprs spsp spss spst sptr spts sris srps srpt srsp srtp srtr ssis ssit ssps sspt ssri ssrs sssi ssss sstp ssts ssws stip stir stis stit stpp stps stri strs stsi stss sttr swip swir swis swit swss swts tiit tip- tipi tipp tips tipt tiri tirr tirs tisi tiss tist titi titp tits titt tiwi tpir tppp tppr tprs tprw tptp tptr tpws tri- trip tris trit trpp trps trsi trst trtr tsis tsps tspt tssi tssr tsst tsts ttss tttt twi- twip twis twit twps twrp twss wiii wiis wiit wipi wipp wipr wips wipt wiri wirr wirt wisp wisr wiss wist wisw witi witr wits witt wiwi wpip wpir wpit wppi wppr wppt wprp wprr wprs wprt wpsp wpsr wpst wpti wptr wptw wpwt wrip writ wrpi wrpp wrpr wrps wrpw wrrs wrrw wrsi wrsr wrss wrsw wrti wrtp wrtr wrts wrtw wrwr wsip wsir wsis wspr wsps wspt wsri wsrp wsrs wsrt wsrw wssi wssp wssr wsss wsst wssw wstp wstr wsts wstt wstw wswi wswr wsws wswt wsww wtip wtis wtpi wtpr wtps wtpt wtri wtrp wtrs wtrt wtrw wtsp wtsr wtss wtti wttr wtts wttt wttw wtwr wtws wtwt wtww wwii wwip wwis wwpr wwpt wwpw wwrr wwrw wwsi wwsp wwsr wwss wwst wwti wwtp wwtr wwtw wwwi wwwr wwws wwww