There are 4 shapes on a 8x8 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, 3)
Distance from target shape to green trapezoid at (2, 4): 2
Distance from target shape to purple right_triangle at (2, 0): 4
Distance from target shape to pink rectangle at (0, 0): 6
Closest shape is the green trapezoid at (2, 4) with distance 2</think>

<answer>(2, 4)</answer>