Array of coordinates? You only given 1 coordinate per function call.

Im getting this same error message. "return.replace is not a function"
I havent used anything called .replace so I dont think this is in my code.

I really like this Kata though, its got my brain going! I just cant seem to move past where Im at because I like to test as I go and it wont let me do anything past this due to this error message.

Nevermind! I got it. Just had to loop through the array of coordinates and validate each one which i wasnt doing.