f--k ffff ffss fofo foof fook foos foso foss foxx foxy foys fsfo fssf k-os kfff kffk kffx kfkx kfok kfoo kfox kfoy kfsk kfxf kfxs kfxx kfxy kfyo kkfs kkkk kkoo kkoy kksf kkss kkxk kkxs kkxx kkys kkyx kkyy koff kofk kofo kofx kofy kokf kokk koko koks kokx koky kook kooo koos kos- kosf koso koss kosy koyf koyo koyy ksfo ksfx kskf kskk ksko ksks kskx ksky ksof ksok ksoo ksos ksox ksso ksss kssx ksxy ksyf ksyy kxff kxkk kxks kxkx kxok kxoo kxos kxox kxss kxxf kxxk kxxo kxxx kyfs kykk kyks kykx kyky kyok kyoo kyos kyox kyoy kysf kysk kysx kyxk kyxx kyxy kyyk kyyo kyys kyyx kyyy off- offo offs offy okko okok okso okyo ooff oofs oofy ooky oooo ooos osoo osos osso ossy oxo- oxof oxos oxox oxxo oxy- oyss s-os sfos sfss skss sky- skyf skys skyy sofo sokk soko soof sook soos sooy soso soss soxs soyo soys sssf ssss syff syfy syso syss syyk xoxo xoyo xxxo xxxx xxxy ykko yoff yoko yoks yoky yoof yook yoso yoyo yyff yyyy