<|im_start|>system
You are a helpful assistant. You first think about the reasoning process in the mind and then provides the user with the answer.<|im_end|>
<|im_start|>user
Find the common rule that maps an input grid to an output grid, given the examples below.

Example 1:
Input:  0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 3 4 3 7
Output: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 3 4 3 7 0 0

Example 2:
Input:  9 6 1 7 9 4 9 6 3 8 9 8 0 5 5 8 7 8 3 6 8 9 1 9
Output: 1 7 9 4 9 6 3 8 9 8 0 5 5 8 7 8 3 6 8 9 1 9 9 6

Example 3:
Input:  7 8 7 2 3 6 9 2 1 4 9 6 9 4 7 8 5 5 4 2 9 9 5 6
Output: 7 2 3 6 9 2 1 4 9 6 9 4 7 8 5 5 4 2 9 9 5 6 7 8

Below is a test input grid. Predict the corresponding output grid by applying the rule you found.
Input:
3 2 5 2 1 7 6 1 4 1 6 8 5 1 3 2 1 0 0 0 8 3 8 5
Show your work in <think> </think> tags, and return the answer in <answer> </answer> tags with space between each number. For example <answer> 1 3 5 7 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>
user