<|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:  9 7 8 5 2 1 0 0 0 0 0 0 0 0 4 2 5 4 8 4 6 1 2 6 6
Output: 7 8 5 2 1 0 0 0 0 0 0 0 0 4 2 5 4 8 4 6 1 2 6 6 9

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

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

Below is a test input grid. Predict the corresponding output grid by applying the rule you found.
Input:
2 5 4 8 3 1 1 9 7 8 2 8 7 9 3 6 0 0 3 6 5 1 3 9 4
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