Determine the units digit of $17^{13} - 17$.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Determine the units digit of $17^{13} - 17$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
0
Determine the units digit of $17^{13} - 17$.
train