There are 5 shapes on a 6x6 grid. Which shape is closest to the orange 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: orange right_triangle at (3, 0)
Distance from target shape to green right_triangle at (4, 1): 2
Distance from target shape to red square at (2, 3): 4
Distance from target shape to yellow rectangle at (2, 0): 1
Distance from target shape to brown right_triangle at (2, 5): 6
Closest shape is the yellow rectangle at (2, 0) with distance 1</think>

<answer>(2, 0)</answer>