There are 4 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 (9, 3)
Distance from target shape to orange square at (3, 7): 10
Distance from target shape to red rectangle at (6, 0): 6
Distance from target shape to yellow trapezoid at (3, 2): 7
Closest shape is the red rectangle at (6, 0) with distance 6</think>

<answer>(6, 0)</answer>