There are 6 shapes on a 7x7 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, 5)
Distance from target shape to cyan square at (3, 2): 5
Distance from target shape to gray rectangle at (6, 4): 6
Distance from target shape to orange trapezoid at (1, 3): 2
Distance from target shape to green trapezoid at (3, 4): 3
Distance from target shape to pink rectangle at (6, 6): 6
Closest shape is the orange trapezoid at (1, 3) with distance 2</think>

<answer>(1, 3)</answer>