<|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 30 crickets and 30 grasshoppers in a cage. Each time the red-haired magician performs a trick, he transforms 4 grasshoppers into 1 cricket. Each time the green-haired magician performs a trick, he transforms 5 crickets into 2 grasshoppers. After the two magicians have performed a total of 18 tricks, there are only grasshoppers and no crickets left in the cage. How many grasshoppers are there at this point? 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
6
There are 30 crickets and 30 grasshoppers in a cage. Each time the red-haired magician performs a trick, he transforms 4 grasshoppers into 1 cricket. Each time the green-haired magician performs a trick, he transforms 5 crickets into 2 grasshoppers. After the two magicians have performed a total of 18 tricks, there are only grasshoppers and no crickets left in the cage. How many grasshoppers are there at this point?
test