There are 5 shapes on a 4x4 grid. Which shape is closest to the red 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: red square at (1, 2)
Distance from target shape to cyan square at (3, 2): 2
Distance from target shape to pink square at (2, 3): 2
Distance from target shape to brown rectangle at (0, 0): 3
Distance from target shape to green trapezoid at (3, 3): 3
Closest shape is the cyan square at (3, 2) with distance 2</think>

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