<|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
 5 students stand in a row for a photo, where A and B must stand next to each other, and A cannot stand at either end. Calculate the total number of possible 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
36
5 students stand in a row for a photo, where A and B must stand next to each other, and A cannot stand at either end. Calculate the total number of possible arrangements.
test