There are 5 shapes on a 9x9 grid. Which shape is closest to the orange 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: orange square at (1, 6)
Distance from target shape to red rectangle at (4, 3): 6
Distance from target shape to green right_triangle at (6, 1): 10
Distance from target shape to cyan trapezoid at (1, 0): 6
Distance from target shape to brown trapezoid at (2, 4): 3
Closest shape is the brown trapezoid at (2, 4) with distance 3</think>

<answer>(2, 4)</answer>