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

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

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

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