<|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
 Select four students from A, B, C, D, and E to participate in mathematics, physics, chemistry, and English competitions, respectively. Given that student A does not participate in the physics and chemistry competitions, there are ______ different competition participation schemes. 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
72
Select four students from A, B, C, D, and E to participate in mathematics, physics, chemistry, and English competitions, respectively. Given that student A does not participate in the physics and chemistry competitions, there are ______ different competition participation schemes.
test