<|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:  1 2 8 5 7 8 6 8 6 8 1 6 1 5 3 3 5 7 7 4 6 5 7 1 7 2 5 4 2
Output: 7 8 6 8 6 8 1 6 1 5 3 3 5 7 7 4 6 5 7 1 7 2 5 4 2 1 2 8 5

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

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

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