<|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:  6 8 7 5 5 7 2 3 6 5 3 8 6 8 7 0 0 0 0 0 0 0 9 3 4 7 9
Output: 8 7 5 5 7 2 3 6 5 3 8 6 8 7 0 0 0 0 0 0 0 9 3 4 7 9 6

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

Example 3:
Input:  2 4 1 8 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Output: 4 1 8 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2

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