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 (4, 1)
Distance from target shape to yellow rectangle at (6, 9): 10
Distance from target shape to brown trapezoid at (3, 9): 9
Distance from target shape to orange rectangle at (7, 0): 4
Closest shape is the orange rectangle at (7, 0) with distance 4</think>

<answer>(7, 0)</answer>