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

<answer>(1, 3)</answer>