There are 4 shapes on a 3x3 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 (1, 2)
Distance from target shape to green right_triangle at (0, 2): 1
Distance from target shape to orange rectangle at (0, 0): 3
Distance from target shape to red square at (2, 2): 1
Closest shape is the green right_triangle at (0, 2) with distance 1</think>

<answer>(0, 2)</answer>