Not sure what's wrong with my code

The challenge is:

Alright, last step but it's a big one. Make a while loop that runs until start is falsey. Inside the loop, use random.randint(1, 99) to get a random number between 1 and 99. If that random number is even (use even_odd to find out), print "{} is even", putting the random number in the hole. Otherwise, print "{} is odd", again using the random number. Finally, decrement start by 1. I know it's a lot, but I know you can do it!

When I try the attached code, I get an error that says Task 1 is no longer passing (Task 1 was to import random). I'm pretty sure my code is correct. Any idea whats going on here?

import random

start = 5

def even_odd(num):
    # If % 2 is 0, the number is even.
    # Since 0 is falsey, we have to invert it with not.
    return not num % 2

while start:
    num = random.randint(1,99)
    if even_odd(num):
        print('{} is even'.format(num))
    else
        print('{} is odd'.format(num))
    start -= 1