There are 5 shapes on a 8x8 grid. Which shape is closest to the brown rectangle 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 rectangle at (2, 1)
Distance from target shape to red trapezoid at (4, 3): 4
Distance from target shape to cyan right_triangle at (1, 3): 3
Distance from target shape to blue rectangle at (5, 2): 4
Distance from target shape to pink trapezoid at (2, 2): 1
Closest shape is the pink trapezoid at (2, 2) with distance 1</think>

<answer>(2, 2)</answer>