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

<answer>(6, 2)</answer>