There are 4 shapes on a 8x8 grid. Which shape is closest to the orange trapezoid 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 trapezoid at (5, 4)
Distance from target shape to green right_triangle at (2, 3): 4
Distance from target shape to red right_triangle at (0, 4): 5
Distance from target shape to gray rectangle at (0, 3): 6
Closest shape is the green right_triangle at (2, 3) with distance 4</think>

<answer>(2, 3)</answer>