iiii iiio iiis iiit iioi iioo iiop iios iisi iisp iist iitt ioii ioio ioit iooi iooo ioos iops ioso ioto ipop ipos ippo ipsi ipso ipsp ipss ipto ipts iptv ipvs isis isit iso- isop isos isps issi isso issp isss isti isto istp ists itis itoi itoo itos itsi itso itsp itto oiii oios oist oiti oooo ooos oops oosi oost ootp oots opii opio opis opit opo- opos oppi oppo opps opsi opti opto opts osii osip osis osoi osoo osos osov ossi osso osti osts otis otit oto- otoo otos otov otpp otso otti otto otts ovi- ovis ovo- ovoo ovot ovpp piip piot pipi pipo pipp pips pisi piso piss pist piti pito pits pitt pivo poio pois poop poos poot pop- popi popo popp pops popt posi poso poss post poti poto pots pott povo povs ppos pppo pppp ppps ppss ppts pptt pptv psip psis psoi psos psov pspi pspp psps psso psst psts pstv psvt ptop pvts s-ii s-iv s-os s-vt siit siop sios siot sipi sipo sipp sips sipt sisi siss sist sit- siti sito sits sitt sivi sois soit soop soos soot sopi sopo sopp sops sosi soso soss sost sosv soto sotp sots sovo sovs spio spip spis spit spiv spoo spop spos spot spps spso spsp spss spst spto spts ssis ssit ssop ssot sspo ssps sspt sssi ssss sstp ssts ssvp st-v stio stip stis stit stoo stop stos stot stpp stps stsi stss stvs svit tiit tiop tios tip- tipi tipo tipp tips tipt tisi tiso tiss tist titi tito titp tits titt tivi tivo tois toit toos toot top- topi topo topp tops topt topv tosi toso toss tost toti toto tots tott tovo tppp tptp tsis tsiv tsoi tsop tsos tspo tsps tspt tssi tsst tsts tsvi ttop ttss tttt tvis tvos tvss tvtv viii vios vips visi viso visp viss vist viti vito vitt vivi vivo voio voip vois voit voot vopt vosi voso voss voto votp vsip vsop vsto vt-i vvvv