There are 6 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 (1, 3)
Distance from target shape to red right_triangle at (3, 0): 5
Distance from target shape to cyan rectangle at (2, 6): 4
Distance from target shape to orange rectangle at (1, 0): 3
Distance from target shape to yellow trapezoid at (3, 8): 7
Distance from target shape to gray trapezoid at (7, 0): 9
Closest shape is the orange rectangle at (1, 0) with distance 3</think>

<answer>(1, 0)</answer>