There are 4 shapes on a 9x9 grid. Which shape is closest to the pink right_triangle in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: pink right_triangle at (0, 3)
Distance from target shape to purple square at (6, 3): 6
Distance from target shape to cyan trapezoid at (6, 2): 7
Distance from target shape to red rectangle at (1, 0): 4
Closest shape is the red rectangle at (1, 0) with distance 4</think>

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