There are 5 shapes on a 9x9 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 (8, 7)
Distance from target shape to cyan square at (6, 7): 2
Distance from target shape to yellow trapezoid at (3, 7): 5
Distance from target shape to brown rectangle at (4, 6): 5
Distance from target shape to gray trapezoid at (3, 1): 11
Closest shape is the cyan square at (6, 7) with distance 2</think>

<answer>(6, 7)</answer>