cccc cccu cccv ccee ccgc ccoc ccrc ccre ccrg ccuc ccvo cec- cece ceco ceec cege cego ceor ceou cer- cerc cere cero cevo cgcc cgcg cger cgro coce coco cocu cogo cor- corc core corg coro corr coue cour cove covo crcc crce crcr cre- crec cree creg creo creu croc croe croo cror crue crug cucc cuce cuer cure curo curr cuve cvcc cver cvrg cvrr eccc ecce ecco eco- ecog ecou ecrc ecrr ecru ecrv eeee eeoc eerc eerg eero egcc egcg egcr egec egee eger egge eggo ego- egor egov egre eore ercc erce erec erer erev erg- ergg ergo eroc eroe eroo errc erre erro eruc erur eruv erve euer euge eur- eurc eure euro ever evoe evoo evre gc-c gccc gcov gcrg gece geer gege gegg gego geo- geog gere gero geru geue geve gevo gggg goce gocr goer gogo goog goor gore gorg goro gorr gou- goug gour gove grcc grce grec gree greg greu grev groc grog groo gror grou grov grrr grue grug grur grve guer guge gugg gugu gure gurg guro gurr guru gvvv o-eo occc oce ocee ocre ocro ocrr ocur oec- oecc oeec oere ogee oger ogge ogog ogou ogre ogro oocr ooer oooo oore orce orco ore- orec oreg oreo orer orge orgo oro- oroe oror orro orve orvr oucc ouer ouge our- oure ouro ouu- ovee over ovo- ovoo ovre rccc rcgc rcrg rcuv rcvr recc rece recr recu reev rege rego regr regu reog reou rere rerg rero reru reue reuu reve revo rocc roce roco roeg roer roev roge rogg rogo roog roor rorc rore roro roru roue rove rovo rrrr ruce ruer ruge rugg rurc rure ruro ruru ruve ruvu rv-c rver ucrc ugcc ugcg ugeo uggo ugro ugur uguu uocc uor- uore uovo ure- urge urgu uro- uroo urre urur urve uuoc uuuu uv-c uver uvvu vcug vecc veer vege veor ver- vere vero veur veve vevo vgcc voce voer voeu voge vogu vooc voog voor vor- vore voro voru voue vour vreo vroc vuco vugg vugo vurg vver vvog vvvv