There are 6 shapes on a 7x7 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 (4, 5)
Distance from target shape to blue trapezoid at (0, 0): 9
Distance from target shape to gray right_triangle at (5, 2): 4
Distance from target shape to pink rectangle at (6, 1): 6
Distance from target shape to purple rectangle at (3, 6): 2
Distance from target shape to green rectangle at (6, 6): 3
Closest shape is the purple rectangle at (3, 6) with distance 2</think>

<answer>(3, 6)</answer>