k-os kkkk kkoo kkow kkpk kkps kksp kkss kksw kkwk kkws kokk koko kokp koks kook kooo koop koos kopp kops kopw kos- koso kosp koss kpkk kpok kpoo kpop kpow kppk kppo kppp kppw kpso kpsp kpwk kpww kskk ksko ksks ksok ksoo ksop ksos ksow kspk kspo ksps kspw ksso ksss kswo kswp ksws ksww kwkk kwkw kwok kwos kwow kwpw kwsk kwso kwss kwsw kwwk kwws okko okok okpo okso oooo ooos oops opo- opos oppo opps osoo osos osow osso owow poko pook poop poos pop- popo popp pops posk poso poss powk powp pows ppos pppo pppp ppps ppss psos pspp psps psso s-os skop skow skpo skss skws sokk soko sook soop soos sopo sopp sops soso soss sowk sowp sows spok spoo spop spos spps spso spsp spss ssop sspo ssps ssss ssws swoo swop swow swss wkko wkkp wkks wkkw wkok wkoo wkos wkow wkpk wkpo wkps wkpw wksk wkso wksp wkss wksw wkws wokk woko woks wokw wook woop woos woow wopp wops woso wosp woss wosw wowo wowp wows woww wpko wpok wpop wpow wpso wpsp wskk wsko wskp wskw wsok wsoo wsop wsos wspk wspo wsps wssp wsss wssw wsws wsww wwks wwos wwow wwpw wwsk wwsp wwss wwwk wwws wwww