iiii iiis iirs iisi iisp iisr iisu ilir ilis ill- illi illp ills ilpr ilus ipil ippr ipri ipsi ipsp ipss ipur ipus iri- iril irip iris irps irri irrs irsp irul irus isil isis isls ispr isps isri isrp issi issp issr isss issu isup isus iuiu iupp iuss liii liir liis lili lill lils lilu lip- lipi lipl lipp lips lipu liri lirl lirp lirr lirs liru lisi lisp liss lisu lius llll llps lppl lprp lpss lrps lrpu lrrr ls-r lspl lspr lssp lssr luis luli lull lulu lupi lupu luri lurs lusi luss luup piip pil- pili pill pils pilu pipi pipp pips piri pirl pirr pirs piru pisi piss pisu pius plip plis plpp plri plsi plss plup plur plus ppli pppp ppps ppru ppss ppur pri- prii pris prlr prls prps prri prrs prsi prsl prss prus pruu psil psip psis pspi pspp pspr psps psrp puir puis puiu puli pull pulp puls pulu pupi pupl pups pupu pur- puri purl purp purr purs puru pusi puss riis rill rilp rilu ripi ripl ripp ripr rips riri rirs risi risp riss risu rius rlls rpii rpls rpps rrrr rrsp rsis rslp rsps rssl ruis rull rupp ruri rurp rurs ruru rusi russ rusu s-ii sil- sili sill sils silu sipi sipp sips siri sirp sirr sirs siru sisi siss sisu siui sius sl-i slip slir sllp slpi slpp slps slrp slrs slsu slup slur spip spir spis splp splr spls spps spri sprs spsp spss spui spur spus sris srps srsp ssis sslp sspl ssps ssri ssrl ssrs sssi ssss suir suis sul- suli sull sulp sulu sup- supp supr sups sur- suri surp surr surs suru sus- susi susp suss susu suus u-rp uipi uirr ulli ullr ulul ulus upis uppp uppu upri upsi upup uris uriu urls urri ursi urss ursu urup urur urus usip usis uslp uslu uspp usps ussr usss ussu usui usul usus uulu uuri uusi uuuu