There are 4 shapes on a 8x8 grid. Which shape is closest to the gray 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: gray trapezoid at (7, 5)
Distance from target shape to cyan right_triangle at (4, 4): 4
Distance from target shape to orange right_triangle at (5, 5): 2
Distance from target shape to purple right_triangle at (7, 1): 4
Closest shape is the orange right_triangle at (5, 5) with distance 2</think>

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