There are 5 shapes on a 10x10 grid. Which shape is closest to the blue 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: blue right_triangle at (9, 0)
Distance from target shape to yellow rectangle at (6, 3): 6
Distance from target shape to orange rectangle at (9, 5): 5
Distance from target shape to cyan trapezoid at (4, 0): 5
Distance from target shape to gray rectangle at (9, 9): 9
Closest shape is the orange rectangle at (9, 5) with distance 5</think>

<answer>(9, 5)</answer>