There are 5 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 (5, 3)
Distance from target shape to orange square at (0, 3): 5
Distance from target shape to green right_triangle at (2, 2): 4
Distance from target shape to yellow rectangle at (3, 3): 2
Distance from target shape to cyan square at (0, 0): 8
Closest shape is the yellow rectangle at (3, 3) with distance 2</think>

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