There are 5 shapes on a 9x9 grid. Which shape is closest to the blue 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: blue rectangle at (2, 1)
Distance from target shape to orange square at (5, 0): 4
Distance from target shape to green right_triangle at (8, 2): 7
Distance from target shape to purple right_triangle at (3, 8): 8
Distance from target shape to gray trapezoid at (0, 1): 2
Closest shape is the gray trapezoid at (0, 1) with distance 2</think>

<answer>(0, 1)</answer>