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 (9, 9)
Distance from target shape to red trapezoid at (5, 2): 11
Distance from target shape to pink trapezoid at (1, 0): 17
Distance from target shape to gray right_triangle at (0, 4): 14
Distance from target shape to brown rectangle at (1, 7): 10
Closest shape is the brown rectangle at (1, 7) with distance 10</think>

<answer>(1, 7)</answer>