There are 4 shapes on a 8x8 grid. Which shape is closest to the brown 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: brown trapezoid at (5, 4)
Distance from target shape to green rectangle at (5, 6): 2
Distance from target shape to cyan rectangle at (0, 0): 9
Distance from target shape to red trapezoid at (1, 0): 8
Closest shape is the green rectangle at (5, 6) with distance 2</think>

<answer>(5, 6)</answer>