There are 3 shapes on a 10x10 grid. Which shape is closest to the yellow 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: yellow right_triangle at (0, 3)
Distance from target shape to brown square at (8, 1): 10
Distance from target shape to gray rectangle at (6, 0): 9
Closest shape is the gray rectangle at (6, 0) with distance 9</think>

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