pprf ppsf ppsh ppss pre- pred pree pref prek prep pres prfs prhs pro- prod proe prof proo prop pros prpd prps prrd prrs prsd prse prso prss psdp psdr psds psfk psfs pshs psos psph pspp pspr psps psrd psrk psrp psse psso rder rdhs rdos rdso redd rede redh redo redr reds reed reef reek reep rees refd refe reff refr refs rehe rehs reke reko reks reod reof reop reos repe repo repp repr reps rerd rere rero rers rese resh reso resp ress rfds rfef rfhs rhee rheo rhes rhfs rhhs rhod rhoh rhos rkkf rkos rkss rodd rode rodo rods roed roer roes rofe roff rofo rohe rohr rohs roke rokh rokk roko rokr roks rood roof rook roop roor roos rope ropo rops rore rork roro rose rosh roso rosp ross rpdp rpho rphs rpoe rpof rpos rpps rred rrhs rrrr rrsp rsdd rsds rsee rshd rshs rsos rspk rspo rsps rsre s-os sdds sdef sdep sder sdes sdhd sdhs sdpr sdps sdrs sdsf sdss se-d se-e se-f se-h se-k se-o se-s sede sedo seds seed seef seeh seek seep seer sees seff sehe sehk sehr sehs seke sekk seko seod seok seop sepd sepe sepo sepp sepr seps serd sere serf serk sero serp serr sers sese sesh seso sess sfdk sfer sfhs sfor sfos sfpd sfro sfss she- shed shee shef sheh shek sheo shep sher shes shhh shhs shod shoe shof shok shoo shop shor shos shps shre shrp shrs sked skee skeo skep sker skes skhs skoe skop skor skpo sksd skss sodd sode sodo sods soeo soep soes sofo sohh soho sohp sohs soke sokk soko sood soof sook soop soor soos sopd sope soph sopo sopp sops sord sore sorh soro sorr sors sose sosh soso soss spde spdf spdp spdr sped spee spef spek sper spes spfs sphr sphs spke spkr spod spok spoo spop spor spos sppd sppf spps sprd spro sprs spsd spse spso spsp spss srde sreo sres srhs sros srps srsd srsp ssdd ssdf ssdp ssee ssep sses ssfp sshs ssop sspe sspf sspo ssps ssrs sssf sssh ssss