There are 5 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, 4)
Distance from target shape to pink rectangle at (3, 4): 1
Distance from target shape to brown trapezoid at (5, 3): 4
Distance from target shape to gray right_triangle at (1, 4): 1
Distance from target shape to green rectangle at (0, 1): 5
Closest shape is the pink rectangle at (3, 4) with distance 1</think>

<answer>(3, 4)</answer>