There are 6 shapes on a 7x7 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 (3, 0)
Distance from target shape to red right_triangle at (6, 1): 4
Distance from target shape to blue square at (5, 0): 2
Distance from target shape to green square at (6, 4): 7
Distance from target shape to brown right_triangle at (4, 5): 6
Distance from target shape to orange rectangle at (3, 3): 3
Closest shape is the blue square at (5, 0) with distance 2</think>

<answer>(5, 0)</answer>