cccc cccf cccu cccv ccee ccfc ccff ccoc ccrc ccre ccrf ccuc ccvo cec- cece ceco ceec cef- cefc ceke ceor ceou cer- cerc cere cerf cero cevo cfcf cfco cffr cfor cfre ckck ckco ckcv cker ckfr ckoc ckoo ckor ckrc ckvo coce cock coco cocu cofc cofe coff cok- coke coko coof cook cor- corc core corf cork coro corr coue couk cour cove covo crcc crce crcr cre- crec cree creo creu crfc crkc croc croe crok croo cror crue cruk cucc cuce cuck cuek cuer cufc cuff cufo cuk- cuke cure curf curo curr cuve cvcc cver cvfr cvrr eccc ecce ecco ecef ecfc ecfr ecko eco- ecou ecrc ecrf ecrr ecru ecrv eeee eefe eeke eeoc eerc eero efco efeo efke efor ekco ekek eker ekfc ekur eore ercc erce erec erer erev erfc erke eroc eroe eroo errc erre erro eruc erur eruv erve euer eufc eur- eurc eure euro ever evoe evoo evre evvk f--k fccf fcuk fece feck feek feer fefc fefe feff fefo feke feko feof ferc fere ferk fero ferr feru ferv feve fevr ffcc ffee ffff ffrr foce fock foco foer fofo foke foof fook for- fore fork foro forr four fove fr-v frcc free freo frfc froe frou frue fuc- fuck fufc fuff fufu fuke fukk fuko fuku fuor fur- fure furo furr kccc kcck kccr kccu kccv kcec kcee kceo kceu kcfc kcfo kcfv kckc kckf kckk kcko kckr kckv kcoe kcof kcor kcou kcrc kcro kcrr kcru kcrv kcue kcuf kcuk kcvk kcvo kcvr kcvu kcvv keck keco kecr keef keek keer kefc keff kefr kekc keke keko keku keok ker- kerc kere kerf kerk kero kerr keru kerv keur keve kfcf kfco kfcr kfer kfff kffk kffv kfok kfoo kfor kfrc kfre kfro kfrr kfru kfuo kfve kfvr kkck kkco kkcr kkfr kkkk kkoo kkor kkov kkrc kkre kkrf kkrk kkro kkrr kkrv kkuu kkvr kkvu kkvv kocf kock kofc kofe koff kofk kofo kofu kokc koke kokf kokk koko kokr koku kooc kook kooo koor koou koov korc kore korf kork koro korr koru korv koue kour kouu kovc kove kovk kovo kovr krcc krce krco krcu krec kree kref krek kreo kreu krev krfc krfe krff krfo krkc krke krkk krko krkr krku krkv kroc kroe krof krok kroo kror krov krrc krre krrf krrk krro krrr kruc krue kruf kruk krur krvc krve krvf krvk krvo krvr krvv kucc kuce kuco kucr kucv kuek kueu kufc kuff kufo kufr kuke kukk kuku kuok kuoo kure kurk kuro kurr kuru kurv kuuk kuur kuuu kuvo kuvr kvcc kvce kvcf kvck kvco kvcr kvcu kvcv kvec kver kvfc kvoc kvoe kvok kvoo kvor kvou kvov kvrc kvre kvrf kvro kvrr kvrv kvue kvuu kvvf kvvr kvvv o-eo occc oce ocee ocef ocke ocre ocro ocrr ocur oec- oecc oeec oere oeuf ofcr ofek ofer off- offc offe offo offr offu ofor ofre okcu oker okko okok okor okre okro okur oocr ooer ooff ooku oooo oore orce orco ore- orec orek oreo orer orfe orff orfu orke orko oro- oroe orof orok oror orro orve orvr oucc ouer oufc oufe ouff our- oure ouro ouu- ovee over ovo- ovoo ovre rccc rcfc rcuv rcvr recc rece reck recr recu reef reek reev refe reff refr refu reke reko reof reou rere rero reru reue reuf reuk reuu reve revo rfef rffc rkkf rocc roce rock roco roer roev rofc rofe roff rofo roke rokk roko rokr roku roof rook roor rorc rore rork roro roru roue rouf rouk rove rovo rrfc rrrr ruce ruck ruer rufc rufe ruff rufo ruke rukk ruku ruok rurc rure ruro ruru ruve ruvu rv-c rver ucfv ucrc ufcu ufer uffe ufuk ukcc ukek ukeu ukko ukok ukrc ukur uocc uofo uoke uor- uore uovo ure- urfe urff urke uro- urok uroo urre uruk urur urve uuoc uuuu uv-c uver uvok uvvu vecc veck veer veke veor ver- vere verk vero veur veve vevo vfcc vfor vkor voce voer voeu voff vofr voke vooc voor vor- vore voro voru voue vouk vour vovk vref vreo vroc vruk vuco vuku vver vvvv