k-os kkkk kkoo kkoy kkpk kkps kksp kkss kkys kkyy kokk koko kokp koks koky kook kooo koop koos kopp kops kopy kos- koso kosp koss kosy koyo koyy kpkk kpky kpok kpoo kpop kpoy kppk kppo kppp kpso kpsp kpyk kskk ksko ksks ksky ksok ksoo ksop ksos kspk kspo ksps ksso ksss ksyy kykk kyks kyky kyok kyoo kyos kyoy kyp- kyps kysk kysp kyyk kyyo kyys kyyy okko okok okpo okso okyo ooky oooo ooos oops opo- opos oppo opps oppy opsy osoo osos osso ossy osyp oyss poko poky pook poop poos pop- popo popp pops popy posk poso poss posy poyo poys ppos pppo pppp ppps ppss psos pspp psps psso psy- psys pykk pyo- pyos pypy pysk pyss s-os skop skpo skss sky- skys skyy sokk soko sook soop soos sooy sopo sopp sops sopy soso soss soyo soys spok spoo spop spos spoy spps spso spsp spss spy- spys ssop sspo ssps ssss sypo syso syss syyk ykko yoko yoks yoky yook yoop yopo yopy yoso yoyo ysop yyyy