cccc cccf cccv ccee ccfc ccff ccoc ccrc ccre ccrf ccvo cec- cece ceco ceec cef- cefc ceor cer- cerc cere cerf cero cevo cfcf cfco cffr cfor cfre coce coco cofc cofe coff coof cor- corc core corf coro corr cove covo crcc crce crcr cre- crec cree creo crfc croc croe croo cror cvcc cver cvfr cvrr eccc ecce ecco ecef ecfc ecfr eco- ecrc ecrf ecrr ecrv eeee eefe eeoc eerc eero efco efeo efor eore ercc erce erec erer erev erfc eroc eroe eroo errc erre erro erve ever evoe evoo evre fccf fece feer fefc fefe feff fefo feof ferc fere fero ferr ferv feve fevr ffcc ffee ffff ffrr foce foco foer fofo foof for- fore foro forr fove fr-v frcc free freo frfc froe o-eo occc oce ocee ocef ocre ocro ocrr oec- oecc oeec oere ofcr ofer off- offc offe offo offr ofor ofre oocr ooer ooff oooo oore orce orco ore- orec oreo orer orfe orff oro- oroe orof oror orro orve orvr ovee over ovo- ovoo ovre rccc rcfc rcvr recc rece recr reef reev refe reff refr reof rere rero reve revo rfef rffc rocc roce roco roer roev rofc rofe roff rofo roof roor rorc rore roro rove rovo rrfc rrrr rv-c rver vecc veer veor ver- vere vero veve vevo vfcc vfor voce voer voff vofr vooc voor vor- vore voro vref vreo vroc vver vvvv