ffff ffii ffps ffrr ffss fiff fifi fiii fiil fili fill fils fipp fips firs fisi fiss flii flip flis fprf fril frip fris frps fsfi fspf fssf fssp ifil ifis ifps ifrf ifri ifsp iiii iiis iipf iirs iisi iisp iisr ilir ilis ill- illi illp ills ilpr ipil ippf ippr ipri ipsi ipsp ipss iri- iril irip iris irps irri irrs irsf irsp isfp isil isis isls ispf ispr isps isri isrp issf issi issp issr isss liff lifl liii liir liis lili lill lils lip- lipi lipl lipp lips liri lirl lirp lirr lirs lisi lisp liss llll llps lpfp lppl lprp lpss lrif lrps lrrr ls-r lspl lspr lssp lssr pfff pffr pfis pfli pfps piff pifs piip pil- pili pill pils pipi pipp pips piri pirl pirr pirs pisi piss plff plif plip plis plpp plri plsi plss ppif ppli pppp ppps pprf ppsf ppss prfs pri- prif prii pris prlr prls prps prri prrs prsi prsl prss psfs psil psip psis pspi pspp pspr psps psrp rffl riff rifs riif riis rill rilp ripi ripl ripp ripr rips riri rirs risi risp riss rlif rlls rpii rpls rpps rrif rrrr rrsp rsis rslp rsps rssl s-ii sfls sfss siff sifl sifr sil- silf sili sill sils sipi sipp sips sirf siri sirp sirr sirs sisi siss sl-i slip slir sllp slpi slpp slps slrp slrs spfs spip spir spis splp splr spls sppf spps spri sprs spsp spss srfi sris srps srsp ssfl ssfp ssis sslp sspf sspl ssps ssri ssrl ssrs sssf sssi ssss