k-os kkkk kkoo kkor kkot kkow kkpk kkps kkpt kkrk kkro kkrr kkrs kkrt kksp kksr kkss kkst kksw kktk kkts kkwk kkws kokk koko kokp kokr koks kook kooo koop koor koos koot kopp kopr kops kopt kopw kork koro korr kors kort kos- koso kosp kosr koss kost kotk koto kotr kots kott kowr kpkk kpkr kpok kpoo kpop kpow kppk kppo kppp kppr kppw kprk kpro kprp kprr kprs kprt kprw kpso kpsp kpto kptr kpts kptt kptw kpwk kpwr kpwt kpww krkk krko krkr krks krkw krok kroo krop kror kros krow krpr krps krpt krrk krro krrr krrs krrt krrw krsk krsr krss krst krsw krtk krto krtr krts krwk krwp krwr kskk ksko kskr ksks ksok ksoo ksop ksor ksos ksow kspk kspo kspr ksps kspt kspw ksro ksrp ksrr ksrs ksrt ksrw ksso kssr ksss ksst kstk ksto kstp kstr ksts kstt kstw kswo kswp ksws kswt ksww ktkk ktko ktkr ktks ktkt ktok ktoo ktop ktor ktot ktpk ktpo ktpr ktpt ktrk ktro ktrp ktrr ktrs ktrt ktrw ktso ktsr ktst ktsw kttk ktto kttp kttr ktts kttt kttw ktwo ktws kwkk kwkr kwkw kwok kwor kwos kwow kwpt kwpw kwrk kwro kwrp kwrr kwrs kwrt kwrw kwsk kwso kwss kwst kwsw kwto kwtr kwts kwtw kwwk kwwr kwws kwwt okko okok okor okot okpo okro okso okto oooo ooos oops oort oost ootp oots ootw opo- opor opos oppo opps opto opts orko oro- orok oror oros orot orps orro orrs orsk orso orto orts orwo osoo osor osos osow osro osso ostr osts oto- otok otoo otor otos otow otpp otpw otro otrs otso otto otts otwo owow owt- owtt pkts poko pook poop poor poos poot pop- popo popp pops popt pork poro porr pors port posk poso poss post poto pots pott potw powk powp powr pows powt ppos pppo pppp ppps ppss ppts pptt pro- proo prop pros prot prow prps prrs prso prss prtp prtr psos pspp pspr psps psrk psrp psso psst psts ptop pttk pwts rkos rkss rkts rokk roko rokr roks rook roop roor roos root ropo rops rork roro rort roso rosp ross rost rotk roto rotr rots rott rowk rowp rowr rows rowt roww rpos rpps rpts rrrr rrsp rsos rspk rspo rsps rstp rsts rtps rtss rttp rtts s-os skop skor skot skow skpo skrt skss skws sokk soko sook soop soor soos soot sopo sopp sops soro sorr sors sort soso soss sost sotk soto sotp sots sotw sowk sowp sowr sows sowt spkr spok spoo spop spor spos spot spps spro sprs spso spsp spss spst spto sptr spts sros srps srpt srsp srtp srtr ssop ssot sspo ssps sspt ssrs ssss sstp ssts ssws stks stok stoo stop stor stos stot stow stpp stps strk stro strs stss sttr swoo swop swor swot swow swss swts tkos tkts toko took toor toos toot top- topo topp tops topt tork toro torp torr tors tort tosk toso toss tost toto totr tots tott towk tows tpks tppp tppr tprs tprw tptp tptr tpws troo trop tros trot trow trpp trps trst trtr tsks tsop tsos tspo tsps tspt tssr tsst tsts ttop ttss tttt two- twoo twop twos twot twps twrp twss wkko wkkp wkkr wkks wkkt wkkw wkok wkoo wkor wkos wkot wkow wkpk wkpo wkpr wkps wkpt wkpw wkrk wkro wkrp wkrr wkrs wkrt wksk wkso wksp wksr wkss wkst wksw wktk wkto wktp wktr wkts wktt wkws wokk woko wokr woks wokw wook woop woos woot woow wopp wops work woro worp worr wors wort worw woso wosp woss wost wosw wotr wots wott wotw wowo wowp wows wowt woww wpko wpkr wpok wpop wpor wpot wpow wppr wppt wprk wpro wprp wprr wprs wprt wpso wpsp wpsr wpst wptk wptr wptw wpwt wrkk wrko wrkr wrks wrkt wrkw wrok wroo wrop wros wrot wrow wrpp wrpr wrps wrpw wrrk wrro wrrs wrrw wrso wrsr wrss wrsw wrto wrtp wrtr wrts wrtw wrwr wskk wsko wskp wskr wskw wsok wsoo wsop wsor wsos wspk wspo wspr wsps wspt wsrk wsro wsrp wsrs wsrt wsrw wssp wssr wsss wsst wssw wstk wsto wstp wstr wsts wstt wstw wswr wsws wswt wsww wtkk wtkp wtkr wtks wtkt wtkw wtok wtor wtot wtow wtpr wtps wtpt wtro wtrp wtrs wtrt wtrw wtsk wtso wtsp wtsr wtss wtto wttr wtts wttt wttw wtwk wtwo wtwr wtws wtwt wtww wwkr wwks wwor wwos wwot wwow wwpr wwpt wwpw wwrk wwrr wwrw wwsk wwsp wwsr wwss wwst wwtk wwtp wwtr wwtw wwwk wwwr wwws wwww