There are 6 shapes on a 3x3 grid. Which shape is closest to the brown rectangle in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: brown rectangle at (1, 2)
Distance from target shape to blue trapezoid at (0, 0): 3
Distance from target shape to red right_triangle at (1, 1): 1
Distance from target shape to purple trapezoid at (2, 2): 1
Distance from target shape to gray trapezoid at (2, 0): 3
Distance from target shape to yellow right_triangle at (2, 1): 2
Closest shape is the red right_triangle at (1, 1) with distance 1</think>

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