There are 6 shapes on a 5x5 grid. Which shape is closest to the orange 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: orange square at (2, 3)
Distance from target shape to brown rectangle at (1, 1): 3
Distance from target shape to purple rectangle at (2, 1): 2
Distance from target shape to yellow square at (4, 3): 2
Distance from target shape to cyan right_triangle at (4, 4): 3
Distance from target shape to gray rectangle at (4, 1): 4
Closest shape is the purple rectangle at (2, 1) with distance 2</think>

<answer>(2, 1)</answer>