There are 5 shapes on a 10x10 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 (1, 2)
Distance from target shape to yellow rectangle at (0, 8): 7
Distance from target shape to green rectangle at (8, 8): 13
Distance from target shape to cyan trapezoid at (6, 0): 7
Distance from target shape to purple square at (8, 9): 14
Closest shape is the yellow rectangle at (0, 8) with distance 7</think>

<answer>(0, 8)</answer>