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 (2, 7)
Distance from target shape to brown rectangle at (4, 7): 2
Distance from target shape to pink right_triangle at (7, 5): 7
Distance from target shape to yellow right_triangle at (4, 2): 7
Distance from target shape to purple trapezoid at (5, 7): 3
Distance from target shape to gray square at (4, 6): 3
Closest shape is the brown rectangle at (4, 7) with distance 2</think>

<answer>(4, 7)</answer>