There are 6 shapes on a 5x5 grid. Which shape is closest to the pink 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: pink square at (1, 3)
Distance from target shape to yellow trapezoid at (3, 4): 3
Distance from target shape to blue square at (1, 1): 2
Distance from target shape to gray rectangle at (0, 2): 2
Distance from target shape to red right_triangle at (0, 0): 4
Distance from target shape to brown square at (1, 2): 1
Closest shape is the brown square at (1, 2) with distance 1</think>

<answer>(1, 2)</answer>