<|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 6 uncolored fish arranged in a row. Xiao Ming uses red and blue colors to color these fish. Each fish can only be colored in one color. Two adjacent fish cannot both be colored red. Find the number of coloring methods such that there are both red and blue fish. Express your answer as a single integer. 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
20
There are 6 uncolored fish arranged in a row. Xiao Ming uses red and blue colors to color these fish. Each fish can only be colored in one color. Two adjacent fish cannot both be colored red. Find the number of coloring methods such that there are both red and blue fish. Express your answer as a single integer.
test