f--k ffff ffps ffss fofo foof fook foos fopp fops foso foss fsfo fspf fssf fssp k-os kfff kffk kfok kfoo kfsk kfsp kkfs kkkk kkoo kkpk kkps kksf kksp kkss koff kofk kofo kofp kokf kokk koko kokp koks kook kooo koop koos kopf kopp kops kos- kosf koso kosp koss kpfk kpkk kpof kpok kpoo kpop kppk kppo kppp kpsf kpso kpsp ksfo kskf kskk ksko ksks ksof ksok ksoo ksop ksos kspk kspo ksps ksso ksss off- offo offs okko okok okpo okso ooff oofs oooo ooos oops opo- opos oppo opps osoo osos osso pfff pfkp pfps poff poko poof pook poop poos pop- popo popp pops posk poso poss ppos pppo pppp ppps ppsf ppss psfk psfs psos pspp psps psso s-os sfos sfss skop skpo skss sofo sokk soko soof sook soop soos sopo sopp sops soso soss spfs spok spoo spop spos sppf spps spso spsp spss ssfp ssop sspf sspo ssps sssf ssss