iiii iiio iiis iioi iioo iiop iios iisi iisp ilio ilis ill- illi illo illp ills iloo ilos ioii ioio iolo iooi iooo ioos iopl iops ioso ipil iplo ipop ipos ippo ipsi ipso ipsp ipss isil isis isls iso- isol isop isos isps issi isso issp isss liii liis lili lill lilo lils lio- lios lip- lipi lipl lipo lipp lips lisi liso lisp liss llll lloo llps lois loli loll lolo lols lool loop loos lopi lopp lops losi loso losp loss lppl lpss lspl lsso lssp oiii oils oios olio olis olli ollo olos olsi oolo oooo ooos oops oosi opii opio opis opls opo- opos oppi oppo opps opsi osii osip osis osli oslo osoi osoo osos ossi osso piip pil- pili pill pilo pils pipi pipo pipp pips pisi piso piss plio plip plis ploo plop plos plpp plsi plss poil poio pois poli poll polo pols pool poop poos pop- popi popo popp pops posi poso poss ppli pplo ppos pppo pppp ppps ppss psil psip psis psoi psol psos pspi pspp psps psso s-ii s-os sil- sili sill silo sils siol siop sios sipi sipo sipp sips sisi siss sl-i slip sllp sloo slop slos slpi slpp slps soil sois soli soll solo solp sols sool soop soos sopi sopo sopp sops sosi soso soss spio spip spis splo splp spls spoo spop spos spps spso spsp spss ssis sslp ssop sspl sspo ssps sssi ssss