There are 5 shapes on a 8x8 grid. Which shape is closest to the blue rectangle 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 rectangle at (6, 4)
Distance from target shape to brown rectangle at (0, 2): 8
Distance from target shape to green right_triangle at (4, 5): 3
Distance from target shape to red trapezoid at (5, 5): 2
Distance from target shape to cyan square at (3, 4): 3
Closest shape is the red trapezoid at (5, 5) with distance 2</think>

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