cccc cccf cccu ccfc ccff ccgc ccoc ccrc ccrf ccrg ccuc cfcf cfco cffr cfgo cfor cfrg cgcc cgcg cgfc cgro coco cocu cofc coff cogo coof cor- corc corf corg coro corr cour crcc crcr crfc croc croo cror crug cucc cufc cuff cufo curf curo curr fccf ffcc ffff ffrr foco fofo fogg fogo foof for- forg foro forr foug four frcc frfc frog frou frug fuc- fufc fuff fufu fugo fugu fuor fur- furg furo furr gc-c gccc gccf gcfc gcrg gfcf gfor ggfg gggg gocr goff gofr gofu gogo goof goog goor gorf gorg goro gorr gou- gouf goug gour grcc groc grof grog groo gror grou grrr gruf grug grur gufc guff gugg gugu gurg guro gurr guru occc ocro ocrr ocur ofcr off- offc offo offr offu ofgo ofor ogfr ogog ogou ogro oocr ooff oooo orco orff orfu orgo oro- orof oror orro oucc oufc ouff our- ouro ouu- rccc rcfc rcgc rcrg rffc rocc roco rofc roff rofo rogg rogo roof roog roor rorc roro roru rouf rrfc rrrr rufc ruff rufo rugg rurc ruro ruru ucrc ufcu ugcc ugcg uggo ugro ugur uguu uocc uofg uofo uor- urff urgu uro- uroo urur uuoc uuuu