-up fff ffp ffr ffs ffu ffy fpp fpr fps fpu fpy frf frp frr frs fru fry fsf fsp fsr fss fsu fuf fup fur fus fuu fy- fyp p-p pff pfp pfr pfs pfu pfy ppf ppp ppr pps ppu prf prp prr prs pru pry ps- psf psp psr pss psu psy puf pup pur pus puu puy py- pyf pyr pys pyu rff rfp rfr rfs rfu rpf rpp rpr rps rpu rrf rrp rrr rrs rru rsf rsp rsr rss rsu ruf rup rur rus ruu ruy ry- ryf ryr rys ryu ryy sff sfp sfr sfs sfu spf spp spr sps spu spy sr- srf srp srr srs sry ss- ssf ssp ssr sss ssu suf sup sur sus suu suy sy- syp syr sys syu uff ufp ufr ufs ufu up- upf upp upr ups upu ur- urf urp urr urs uru ury usf usp usr uss usu uur uus uuu uys uyu yff yfr yfs yfu ypf yps ypu yrf yrp yrs yru ysp ysr yss ysu ysy yup yur yus yuu yuy yyf yys yyu yyy