<|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 5 college students being assigned to internships at 3 different companies. Each company must receive at least one intern. Determine the number of different possible assignment plans. (Answer with a 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
150
There are 5 college students being assigned to internships at 3 different companies. Each company must receive at least one intern. Determine the number of different possible assignment plans. (Answer with a number)
test