k-os kkkk kkoo kkot kkpk kkps kkpt kksp kkss kkst kktk kkts kokk koko kokp koks kook kooo koop koos koot kopp kops kopt kos- koso kosp koss kost kotk koto kots kott kpkk kpok kpoo kpop kppk kppo kppp kpso kpsp kpto kpts kptt kskk ksko ksks ksok ksoo ksop ksos kspk kspo ksps kspt ksso ksss ksst kstk ksto kstp ksts kstt ktkk ktko ktks ktkt ktok ktoo ktop ktot ktpk ktpo ktpt ktso ktst kttk ktto kttp ktts kttt okko okok okot okpo okso okto oooo ooos oops oost ootp oots opo- opos oppo opps opto opts osoo osos osso osts oto- otok otoo otos otpp otso otto otts pkts poko pook poop poos poot pop- popo popp pops popt posk poso poss post poto pots pott ppos pppo pppp ppps ppss ppts pptt psos pspp psps psso psst psts ptop pttk s-os skop skot skpo skss sokk soko sook soop soos soot sopo sopp sops soso soss sost sotk soto sotp sots spok spoo spop spos spot spps spso spsp spss spst spto spts ssop ssot sspo ssps sspt ssss sstp ssts stks stok stoo stop stos stot stpp stps stss tkos tkts toko took toos toot top- topo topp tops topt tosk toso toss tost toto tots tott tpks tppp tptp tsks tsop tsos tspo tsps tspt tsst tsts ttop ttss tttt