There are 2 shapes on a 4x4 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 (3, 2)
Distance from target shape to purple trapezoid at (1, 3): 3
Closest shape is the purple trapezoid at (1, 3) with distance 3</think>

<answer>(1, 3)</answer>