There are 6 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, 1)
Distance from target shape to purple rectangle at (0, 7): 11
Distance from target shape to gray right_triangle at (7, 0): 3
Distance from target shape to blue trapezoid at (7, 6): 7
Distance from target shape to yellow rectangle at (7, 3): 4
Distance from target shape to red right_triangle at (4, 3): 3
Closest shape is the gray right_triangle at (7, 0) with distance 3</think>

<answer>(7, 0)</answer>