<|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
 Find the difference between the second largest and the third smallest three-digit numbers, each of which has 1, 6, and 8 on each digit. 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
198
Find the difference between the second largest and the third smallest three-digit numbers, each of which has 1, 6, and 8 on each digit.
test