There are 4 shapes on a 10x10 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 (7, 0)
Distance from target shape to orange trapezoid at (1, 9): 15
Distance from target shape to green rectangle at (2, 1): 6
Distance from target shape to gray trapezoid at (4, 3): 6
Closest shape is the green rectangle at (2, 1) with distance 6</think>

<answer>(2, 1)</answer>