There are 3 shapes on a 6x6 grid. Which shape is closest to the orange 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: orange rectangle at (1, 2)
Distance from target shape to brown rectangle at (2, 3): 2
Distance from target shape to pink right_triangle at (4, 4): 5
Closest shape is the brown rectangle at (2, 3) with distance 2</think>

<answer>(2, 3)</answer>