Please read this paragraph of FAQ and check if you are able to reproduce failing test case locally. If your solution passes locally but fails on CW for the same inputs, share your code with us so we could take a look.

@hobovsky, @supersteve3d I have the same problem, how could I solve it ? Thank you guys!

I would say because 'cream': 0 should not be included in the recipe. If you omit it, you have a non zero solution... based on most code, cream:0 would cause an exception.

I made an error in my code. It is now solved.
I'll remove the thread in a day or so as it adds no value.

Thanks @hobovsky.

Please read this paragraph of FAQ and check if you are able to reproduce failing test case locally. If your solution passes locally but fails on CW for the same inputs, share your code with us so we could take a look.

I passed the tests but have repeating errors in the attempt phase... 30 or so 1 should be 2s.. no idea where I am wrong.. it works for all the tests I have thrown at it. I am using the datetime library checking all the 13ths of each month of the input year to see if they are a friday.