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 (4, 5)
Distance from target shape to orange trapezoid at (1, 4): 4
Distance from target shape to yellow trapezoid at (0, 6): 5
Distance from target shape to green trapezoid at (3, 0): 6
Distance from target shape to cyan trapezoid at (6, 0): 7
Closest shape is the orange trapezoid at (1, 4) with distance 4</think>

<answer>(1, 4)</answer>