iiii iiis iirs iisi iisp iisr ilir ilis ill- illi illp ills ilpr ipil ippr ipri ipsi ipsp ipss iri- iril irip iris irps irri irrs irsp isil isis isls ispr isps isri isrp issi issp issr isss liii liir liis lili lill lils lip- lipi lipl lipp lips liri lirl lirp lirr lirs lisi lisp liss llll llps lppl lprp lpss lrps lrrr ls-r lspl lspr lssp lssr piip pil- pili pill pils pipi pipp pips piri pirl pirr pirs pisi piss plip plis plpp plri plsi plss ppli pppp ppps ppss pri- prii pris prlr prls prps prri prrs prsi prsl prss psil psip psis pspi pspp pspr psps psrp riis rill rilp ripi ripl ripp ripr rips riri rirs risi risp riss rlls rpii rpls rpps rrrr rrsp rsis rslp rsps rssl s-ii sil- sili sill sils sipi sipp sips siri sirp sirr sirs sisi siss sl-i slip slir sllp slpi slpp slps slrp slrs spip spir spis splp splr spls spps spri sprs spsp spss sris srps srsp ssis sslp sspl ssps ssri ssrl ssrs sssi ssss