-ism ffff ffii ffps ffrr ffss fiff fifi fifm fiii fimr fipp fips firm firs fisi fism fiss fmri fmsr fmss fprf frim frip fris frps frsm fsfi fsim fspf fssf fssp ifim ifis ifps ifrf ifri ifsp iiii iiis iipf iipm iirs iisi iism iisp iisr imfi imir immi imms impf impi impr imps imri imrr imsf imsi imsp imsr imss ipmi ipmp ipms ippf ippr ipri ipsi ipsp ipss irfm iri- irip iris irms irps irri irrs irsf irsp isfp isim isis ismi isms ispf ispr isps isri isrp issf issi issp issr isss mfps mfri mfrp mfrs miff mifi miii miis mim- mimi mimp mims mipi mipr mips miri mirr mirs mis- misi misr miss mmff mmii mmis mmmm mmms mmpi mmpr mmrf mmrp mpfs mpir mppf mppp mpps mprf mpri mprp mris mrps mrsi msff msfs msmm msms mspi mspp msrp mssf mssi mssm mssp mssr pfff pffr pfis pfps piff pifs piip pimi pimp pims pipi pipp pips piri pirr pirs pisi piss pmip pmmp pmpm pmrs pmsf ppif ppms pppp ppps pprf pprm ppsf ppss prfs pri- prif prii prim pris prps prri prrm prrs prsi prss psfs psim psip psis pspi pspp pspr psps psrp pssm riff rifs riif riis rimi rimm rims ripi ripp ripr rips riri rirs risi rism risp riss rmif rmrp rmsp rpii rpms rpps rrif rrmp rrrr rrsp rsis rsps s-ii sfmm sfss siff sifr siim simi simm simp sims sipi sipp sips sirf siri sirp sirr sirs sisi siss smif smis smps smrf smsp smss spfs spim spip spir spis spmi spms sppf spps spri sprm sprs spsp spss srfi srim sris srps srsp ssfp ssis sspf ssps ssri ssrm ssrs sssf sssi sssm ssss