There are 6 shapes on a 5x5 grid. Which shape is closest to the orange rectangle 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 rectangle at (4, 0)
Distance from target shape to red rectangle at (0, 1): 5
Distance from target shape to gray rectangle at (1, 2): 5
Distance from target shape to cyan right_triangle at (4, 3): 3
Distance from target shape to yellow right_triangle at (1, 3): 6
Distance from target shape to pink right_triangle at (1, 1): 4
Closest shape is the cyan right_triangle at (4, 3) with distance 3</think>

<answer>(4, 3)</answer>