There are 4 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 (4, 6)
Distance from target shape to red rectangle at (4, 4): 2
Distance from target shape to brown right_triangle at (0, 7): 5
Distance from target shape to yellow rectangle at (3, 2): 5
Closest shape is the red rectangle at (4, 4) with distance 2</think>

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