iiii iiis iiit iirs iisi iisp iisr iist iitr iitt ilir ilis ilit ill- illi illp ills illt ilpr ilts ipil ippr ipri ipsi ipsp ipss ipts iri- iril irip iris irps irri irrs irsp irti irtp irts isil isis isit isls ispr isps isri isrp issi issp issr isss isti istp istr ists itil itis itll itri itrs itsi itsp liii liir liis lili lill lils lilt lip- lipi lipl lipp lips liri lirl lirp lirr lirs lirt lisi lisp liss list liti litl litr lits litt llll llps lppl lprp lpss lrps lrrr lrst lrts ls-r lspl lspr lssp lssr lsts ltps ltrs ltsi ltsp ltsr lttr piip pil- pili pill pils pilt pipi pipp pips piri pirl pirr pirs pisi piss pist piti pitr pits pitt plip plis plit plpp plri plsi plss pltt ppli pppp ppps ppss ppts pptt pri- prii pris prlr prls prps prri prrs prsi prsl prss prti prtp prtr psil psip psis pspi pspp pspr psps psrp psst psts riis rill rilp ripi ripl ripp ripr rips ript riri rirs risi risp riss rist riti ritl rits ritt rlls rpii rpls rpps rpts rrrr rrsp rsis rslp rsps rssl rstp rsts rtls rtlt rtps rtss rttp rtts s-ii siit sil- sili sill sils silt sipi sipp sips sipt siri sirp sirr sirs sirt sisi siss sist sit- siti sits sitt sl-i slip slir slit sllp slpi slpp slps slrp slrs slst slts spip spir spis spit splp splr spls spps spri sprs spsp spss spst sptr spts sris srps srpt srsp srtp srtr ssis ssit sslp sslt sspl ssps sspt ssri ssrl ssrs sssi ssss sstl sstp ssts stil stip stir stis stit stlt stpp stps stri strs stsi stss sttr tiit till tilr tils tilt tip- tipi tipp tips tipt tiri tirl tirr tirs tisi tiss tist titi titp tits titt tlli tlrs tpir tpls tppp tppr tprs tptp tptr tri- tril trip tris trit trpp trps trsi trst trtr tsis tsps tspt tssi tssr tsst tsts ttss tttt