There are 6 shapes on a 8x8 grid. Which shape is closest to the blue 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: blue square at (5, 0)
Distance from target shape to purple trapezoid at (2, 0): 3
Distance from target shape to pink trapezoid at (4, 0): 1
Distance from target shape to cyan square at (5, 7): 7
Distance from target shape to gray trapezoid at (1, 3): 7
Distance from target shape to yellow trapezoid at (7, 3): 5
Closest shape is the pink trapezoid at (4, 0) with distance 1</think>

<answer>(4, 0)</answer>