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 (6, 1)
Distance from target shape to purple right_triangle at (1, 1): 5
Distance from target shape to green rectangle at (0, 7): 12
Distance from target shape to cyan right_triangle at (0, 4): 9
Closest shape is the purple right_triangle at (1, 1) with distance 5</think>

<answer>(1, 1)</answer>