k-os kkkk kkmk kkmo kkmr kkms kkoo kkor kkrk kkro kkrr kkrs kksm kksr kkss kmkk kmko kmks kmmk kmmm kmmo kmmr kmms kmok kmom kmor kmro kmrr kmrs kmso kmsr kmss kokk koko kokr koks komo komr koms kook kooo koor koos kork koro korr kors kos- koso kosr koss krkk krko krkr krks krmo krmr krms krok krom kroo kror kros krrk krrm krro krrr krrs krsk krsr krss kskk ksko kskr ksks ksmm ksmo ksmr ksms ksok ksom ksoo ksor ksos ksrm ksro ksrr ksrs kssm ksso kssr ksss mkks mksm mmmm mmms mmor moko momo moms mook moor moos mork moro mors mosk moso moss mrkr msmm msms msor mssm mssr okko okmo okok okom okor okro okso omo- omoo omor omro omsk ooms oooo ooos orko ormo oro- orok orom oror oros orro orrs orsk orso osm- osmo osoo osor osos osro osso rkos rkss rokk roko rokr roks romk romm romo roms rook room roor roos rork roro roso ross rrkm rrrr rsos s-os skor skss smok smos smrk smss sokk soko somm somo sook soom soor soos sorm soro sorr sors soso soss sros ssrm ssrs sssm ssss