There are 4 shapes on a 6x6 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 (4, 2)
Distance from target shape to cyan square at (2, 3): 3
Distance from target shape to red rectangle at (5, 0): 3
Distance from target shape to purple right_triangle at (5, 5): 4
Closest shape is the cyan square at (2, 3) with distance 3</think>

<answer>(2, 3)</answer>