There are 5 shapes on a 9x9 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 (1, 3)
Distance from target shape to yellow square at (7, 7): 10
Distance from target shape to orange trapezoid at (4, 4): 4
Distance from target shape to green trapezoid at (7, 4): 7
Distance from target shape to purple rectangle at (8, 2): 8
Closest shape is the orange trapezoid at (4, 4) with distance 4</think>

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