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

<answer>(5, 0)</answer>