cccc cccf cccs cccu ccfc ccff ccrc ccrf ccrs ccsf ccss ccuc ccus cfcf cfcs cffr crcc crcr crfc crfs crss crus cscc cscf cscr cscs csfc csfr csrc csrs cssr csuf csur csus cucc cufc cuff curf curr curs cuss cusu fccf fcsc ffcc ffff ffrr ffss frcc frfc frsc fscc fssc fssf fuc- fufc fuff fufu fur- furr furs fusc fuss fusu rccc rccs rcfc rcsc rcss rffc rrfc rrrr rscc rscs rsfc rufc ruff rurc rurs ruru russ rusu sccc sccs scfc scr- scrc scrs scsc scsr scsu scur sfcc sfcs sffc sfrc sfss sfsu srcc srfc sscc sscs ssfc ssrc ssrs sssc sssf ssss suc- succ sucr sucs suf- sufc suff sufr sufs sufu sur- surc surf surr surs suru sus- suss susu suus ucrc ucsc ucsf ucsu ufcu urff urss ursu urur urus uscc uscf uscs usfc usfs ussc ussf ussr usss ussu usus uuuu