I assume you are using Python 3 (not yet supported here on CodeWars), as you use the print() (notice the brackets) function.

Also, it seems you forgot to RETURN a value: your function just prints it on screen.

Finally, you are returning a list of tuples, while you should return a list of lists.

I hope this helps (and that CodeWars will notify me if you reply to this: I am getting very few messages notified, sigh...).