There are 5 shapes on a 10x10 grid. Which shape is closest to the gray 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: gray right_triangle at (2, 1)
Distance from target shape to blue trapezoid at (8, 0): 7
Distance from target shape to yellow trapezoid at (3, 9): 9
Distance from target shape to pink right_triangle at (8, 9): 14
Distance from target shape to red trapezoid at (2, 5): 4
Closest shape is the red trapezoid at (2, 5) with distance 4</think>

<answer>(2, 5)</answer>