<|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
 There are five different products arranged in a row on the shelf. Among them, products A and B must be adjacent, while products C and D cannot be adjacent. Calculate the total number of different arrangements. 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
24
There are five different products arranged in a row on the shelf. Among them, products A and B must be adjacent, while products C and D cannot be adjacent. Calculate the total number of different arrangements.
test