k-os kkkk kkmk kkmo kkms kkmy kkoo kkoy kksm kkss kkys kkyy kmkk kmko kmks kmky kmmk kmmm kmmo kmms kmmy kmok kmom kmoy kmso kmss kmyk kmyo kmys kmyy kokk koko koks koky komo koms komy kook kooo koos kos- koso koss kosy koyo koyy kskk ksko ksks ksky ksmm ksmo ksms ksmy ksok ksom ksoo ksos kssm ksso ksss ksyy kykk kykm kyks kyky kym- kymo kyms kyok kyoo kyos kyoy kysk kysm kyyk kyym kyyo kyys kyyy mkks mksm mmmm mmms mmyy moko moky momo moms momy mook moos mosk moso moss mosy moyo msmm msms mssm mymy myo- myos mys- myss myys okko okmo okok okom okso okym okyo omo- omoo omsk ooky ooms oooo ooos osm- osmo osoo osos osso ossy oyss s-os skss sky- skys skyy smok smos smoy smss smyk sokk soko somm somo somy sook soom soos sooy soso soss soyo soys sssm ssss sym- syms syso syss syyk ykko yoko yoks yoky yomo yook yoso yoyo yyyy