There are 6 shapes on a 8x8 grid. Which shape is closest to the red square in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: red square at (0, 0)
Distance from target shape to pink square at (4, 6): 10
Distance from target shape to green rectangle at (3, 7): 10
Distance from target shape to brown right_triangle at (5, 3): 8
Distance from target shape to purple trapezoid at (0, 1): 1
Distance from target shape to orange rectangle at (7, 3): 10
Closest shape is the purple trapezoid at (0, 1) with distance 1</think>

<answer>(0, 1)</answer>