<|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
 As shown in the figure, fill in the numbers 1, 2, ... , 25 into the grid, with each small square containing a number. Each number can and must be used only once, with some numbers already filled in. The requirement is that each number in a small square must be equal to the sum of the numbers in the two adjacent small squares (adjacent through either a common edge or vertex), except for the squares containing the numbers 1 and 2. For example, adjacent to 4, there are 1 and 3, which meets the requirement. Fill in the number in the square marked by "?". 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
14
As shown in the figure, fill in the numbers 1, 2, ... , 25 into the grid, with each small square containing a number. Each number can and must be used only once, with some numbers already filled in. The requirement is that each number in a small square must be equal to the sum of the numbers in the two adjacent small squares (adjacent through either a common edge or vertex), except for the squares containing the numbers 1 and 2. For example, adjacent to 4, there are 1 and 3, which meets the requirement. Fill in the number in the square marked by "?".
test