<|im_start|>system
You are a helpful assistant. You first think about the reasoning process in the mind and then provide the user with the answer. You should try to truely solve the question by yourself without cheating.  <|im_end|>
<|im_start|>user
 Each page number of a 488-page book is printed one time in the book.  The first page is page 1 and the last page is page 488. When printing all of the page numbers, how many more 4's are printed than 8's? Show your work in <think> </think> tags. And return the final answer in <answer> </answer> tags.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>
user
90
Each page number of a 488-page book is printed one time in the book.  The first page is page 1 and the last page is page 488. When printing all of the page numbers, how many more 4's are printed than 8's?
test