a-ak a-ok aaaa aaac aaap aaas aaca aacc aack aaco aacp aacs aaka aaoo aapa aapc aapo aaps aasa aasc aass acaa acac acap acas acca accc acco accp accs acks acoa acop acos acpa acps acsa acsc acss akaa akao akap akas akca akka akko akok akos akpo aksa aoca aocs aokp aoks aopo aosp aoss apac apak apao apap apas apca apcc apco apcs apo- apoc apoo apop apos appa appc apps apsa apso apss asaa asac asak asao asap asas asc- asca ascc asco ascp aska asko asks asoc asok asop asos aspa aspc aspo asps assa assc assk asso assp asss caaa caac caap caas cac- caca cacc cack caco caka caos capa capc capo capp caps casa casc cask caso casp cass ccaa ccac ccap ccas ccca cccc cccp cccs ccoc ccpa ccpp ccps ccsa ccsp ccss ckac ckck ckco ckcs ckoa ckoc ckoo ckos ckpc cksa ckso coak coas coca cock coco cocp cok- coka coko cook coop coos copa copo copp cops cosa cosc coso cosp coss cpaa cpac cpap cpas cpca cpcs cpos cppa cpps cpsa cpsc cpsk cpso csaa csac csak csao csas cscc csco cscs cska csks csos cspa cspc csps cssa k-os kaaa kaak kaap kaas kacc kaco kacp kacs kaka kakc kakk kako kaks kaoa kaoc kaok kaos kap- kapa kapc kapo kapp kaps kas- kasa kasc kask kaso kasp kass kcaa kcac kcap kcas kcca kccc kcck kckc kckk kcko kcos kcpa kcpc kcpo kcps kcsa kcsc kcsp kcss kkaa kkac kkap kkck kkco kkcs kkkk kkoa kkoo kkpc kkpk kkps kksa kksp kkss koac koak koap koas koca kock kocp kocs koka kokc kokk koko kokp koks kooc kook kooo koop koos kopa kopp kops kos- kosa kosc koso kosp koss kpac kpak kpao kpas kpcc kpcs kpkk kpoa kpoc kpok kpoo kpop kppc kppk kppo kppp kpsc kpso kpsp ksac ksak ksas ksca ksck ksco kscs kska kskk ksko ksks ksoc ksok ksoo ksop ksos kspa kspc kspk kspo ksps kssa ksso ksss oaks oaps oasc oass ocac ocak ocap ocas occa occc ocks ocos ocpa ocpp ocsa okak okap okas okka okko okok okpo oksa okso ooaa ooak oooo ooos oops oosa opap opca opo- opos oppa oppo opps opsa osak osap osas osca oscc osco osoo osos ossa osso paak paap paas paca pack paco pacs paka pako paks paoc paos papa papp paps pasa pasc pask paso pasp pass pcaa pcap pcas pcca pccc pccs pcks pcoa pcos pcpp pcps pcsa pcso pkcs poak poas poca pock poco pocs poka poko pook poop poos pop- popa popc popo popp pops posa posk poso poss ppac ppap ppcc ppcs ppoa ppos pppa pppo pppp ppps ppss psac psap psas psca psco psoa psoc psos pspp psps pssa pssc psso s-os sa-c saac saak saap saas saca sacc sack saco sacs saka sakk sako saks saos sapa sapo sapp saps sasa sasc sask saso sass scaa scac scak scap scas sccc sccp sccs sck- scok scoo scop scpa scpo scps scsa scsc scso skac skap skop skpc skpo skss soak soap soas soca sock soco socs soka sokk soko sook soop soos sopa sopo sopp sops sosa soso soss sp-a spac spak spap spas spca spcc spco spcs spoc spok spoo spop spos spps spsa spso spsp spss ssaa ssac ssao ssap ssas ssca sscc sscp sscs ssoc ssop sspa sspc sspo ssps sssa sssc ssss