k-os kkkk kkoo kkot kkoz kkss kkst kktk kkts kktz kkzz kokk koko koks kokz kook kooo koos koot kooz kos- koso koss kost kosz kotk koto kots kott kotz kozk kozo kozt kskk ksko ksks kskz ksok ksoo ksos ksso ksss ksst kssz kstk ksto ksts kstt kstz ktkk ktko ktks ktkt ktkz ktok ktoo ktot ktso ktst kttk ktto ktts kttt kttz ktzk ktzo ktzt ktzz kzks kzkz kzoo kzot kzoz kzst kztk kzts kzzk kzzo kzzs kzzt kzzz okko okok okot okso okto oooo ooos oost oots osoo osos osso osts oto- otok otoo otos otso otto otts s-os skot skss sokk soko sook soos soot soso soss sost sotk soto sots soz- ssot ssss ssts stks stok stoo stos stot stss szot szss tkos tkts toko took toos toot tosk toso toss tost toto tots tott tozo tsks tsos tsst tsts ttss tttt tzzt zoo- zook zoos zoot zoso zoss zots zott zotz zozo zsss ztst zzzs zzzz