a-ak a-ok aaaa aaac aaaf aaar aaas aaca aacc aacf aack aaco aacr aacs aafa aafc aaff aaka aaoo aara aarc aaro aars aasa aasc aasf aass acaa acac acar acas acca accc accf acco accs acfc acfs acks acoa acor acos acr- acra acrc acro acrr acrs acsa acsc acss afaa afak afao afar afca afcc afcs affa affc affo affs afka afkr afoa afoo afor afr- afra afrc afro afrs afsa afsc akaa akao akar akas akca akka akko akok akos akr- akra aksa aoca aocs aoks aora aors aoss arac araf arak arar aras arc- arca arco arcs arfa arfc arff arfs arka arko arks aroa aroo aror aros arr- arra arrc arrk arro arrr arrs ars- arsa arsc arsk arso asaa asac asaf asak asao asar asas asc- asca ascc asco ascr asfa aska asko askr asks asoc asof asok asor asos asra asrc asro asrs assa assc assk asso assr asss caaa caac caaf caas cac- caca cacc cack caco cacr cafa cafc caff cafs caka caor caos cara carc carf cark caro carr cars casa casc cask caso casr cass ccaa ccac ccaf ccar ccas ccca cccc cccf cccs ccfa ccfc ccff ccoc ccra ccrc ccrf ccrs ccsa ccsf ccss cfaa cfac cfao cfar cfca cfcf cfco cfcs cffr cfoa cfor cfos cfra cfsa ckac ckck ckco ckcs ckfr ckoa ckoc ckoo ckor ckos ckrc cksa ckso coak coas coca cock coco cofc coff cofs cok- coka coko coof cook coos cor- cora corc corf cork coro corr cors cosa cosc coso coss crac craf crar cras crca crcc crcr crfc crfs crkc croc crok croo cror crsa crss csaa csac csak csao csar csas cscc cscf csco cscr cscs csfc csfr cska csks csor csos csra csrc csrs cssa cssr f--k faaa faac faas faca facc fack facs fafa fafc faff fafo fako fara farc fark faro farr fars fasa fasc faso fass fcar fcas fcca fccf fcra fcsc ffar ffcc ffff ffrr ffsa ffss foaf foak foar foca fock foco focs fofo foof fook foos for- fora fork foro forr fors fosa foso foss frac frak fras frcc frfc fros frsc frso fsas fscc fsck fsfo fsra fssa fssc fssf k-os kaaa kaaf kaak kaar kaas kacc kaco kacs kafa kafc kaff kafr kafs kaka kakc kakk kako kaks kaoa kaoc kaok kaor kaos kara karf kark karo karr kars kas- kasa kasc kasf kask kaso kasr kass kcaa kcac kcar kcas kcca kccc kcck kccr kcfa kcfc kcfo kckc kckf kckk kcko kckr kcof kcor kcos kcrc kcro kcrr kcrs kcsa kcsc kcsf kcsr kcss kfac kfar kfcf kfco kfcr kfcs kffa kfff kffk kfka kfok kfoo kfor kfra kfrc kfro kfrr kfrs kfsa kfsk kfsr kkaa kkac kkar kkck kkco kkcr kkcs kkfr kkfs kkkk kkoa kkoo kkor kkrc kkrf kkrk kkro kkrr kkrs kksa kksf kksr kkss koac koak koar koas koca kocf kock kocs kofa kofc koff kofk kofo koka kokc kokf kokk koko kokr koks kooc kook kooo koor koos kora korc korf kork koro korr kors kos- kosa kosc kosf koso kosr koss krac krak krar kras krca krcc krco krcs krfc krff krfo krfs krka krkc krkk krko krkr krks kroa kroc krof krok kroo kror kros krrc krrf krrk krro krrr krrs krsa krsc krsf krsk krsr krss ksac ksaf ksak ksar ksas ksca ksck ksco kscr kscs ksfa ksfc ksfo ksfr kska kskf kskk ksko kskr ksks ksoc ksof ksok ksoo ksor ksos ksra ksrf ksro ksrr ksrs kssa ksso kssr ksss oafc oafo oafs oaks oara oars oasc oass ocac ocak ocas occa occc ocfa ocks ocos ocra ocro ocrr ocrs ocsa ofas ofcr off- offa offc offo offr offs ofor ofra okak okas okka okko okok okor okra okro oksa okso ooaa ooak oocr ooff oofs oooo ooos oora oosa orac orak orao orar oras orca orco orcs orff orfs orka orko oro- orof orok oror oros orra orro orrs orsa orsk orso osaf osak osar osas osca oscc osco osfa osoo osor osos osro ossa osso raaf raak raas rac- raca racc rack raco racs rafa rafc raff raka rakk raoc raok raos rara rarf rark raro rars rasa rasc rask raso rass rcac rcaf rcas rccc rccs rcfc rcos rcsa rcsc rcss rffc rkkf rkos rkss roaf roak roar roas roca rocc rock roco rocs rofc roff rofo roka rokk roko rokr roks roof rook roor roos rora rorc rork roro rosa rosc roso ross rras rrfc rrrr rsaa rsaf rscc rscs rsfc rsos rssa s-os sa-c saac saaf saak saar saas saca sacc sack saco sacr sacs safa safc saff safo safr saka sakk sako saks saor saos sara sarc sarf sark saro sarr sars sasa sasc sasf sask saso sass scaa scac scaf scak scar scas sccc sccs scfa scfc sck- scok scoo scor scr- scra scrc scrs scsa scsc scso scsr sfar sfas sfca sfcc sfco sfcs sffc sfor sfos sfra sfrc sfro sfss skac skaf skar skfc skor skra skss soak soar soas soca sock soco socr socs sofa sofo soka sokk soko soof sook soor soos sora soro sorr sors sosa soso soss sraf sras srcc srfc sros ssaa ssac ssao ssas ssca sscc sscs ssfc ssoc ssra ssrc ssrs sssa sssc sssf ssss