There are 4 shapes on a 10x10 grid. Which shape is closest to the purple 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: purple right_triangle at (7, 2)
Distance from target shape to pink rectangle at (5, 3): 3
Distance from target shape to gray trapezoid at (9, 9): 9
Distance from target shape to blue rectangle at (7, 3): 1
Closest shape is the blue rectangle at (7, 3) with distance 1</think>

<answer>(7, 3)</answer>