There are 2 shapes on a 6x6 grid. Which shape is closest to the brown square in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: brown square at (5, 1)
Distance from target shape to blue right_triangle at (4, 4): 4
Closest shape is the blue right_triangle at (4, 4) with distance 4</think>

<answer>(4, 4)</answer>