Kids Tell Kimmel if They Hear Grover Cursing in Viral Clip

Did Grover drop an F-Bomb on Sesame Street?  Jimmy Kimmel asked kids what they though the blue Muppet said in a clip that has gone viral.  I know what I think he said.. So the debate is on.  Did he say  "That's a f--kin' excellent idea." or did he say, "That sounds like an excellent idea," which they say was in the script.??