<|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
 Given the original letter arrangement "abcd", how many different rearrangements are there such that no two originally adjacent letters are adjacent in the new arrangement? Express your answer as a whole number. 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
2
Given the original letter arrangement "abcd", how many different rearrangements are there such that no two originally adjacent letters are adjacent in the new arrangement? Express your answer as a whole number.
test