There are 6 shapes on a 4x4 grid. Which shape is closest to the cyan 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: cyan square at (1, 2)
Distance from target shape to red rectangle at (2, 1): 2
Distance from target shape to pink rectangle at (0, 1): 2
Distance from target shape to blue right_triangle at (2, 0): 3
Distance from target shape to brown square at (3, 0): 4
Distance from target shape to gray trapezoid at (1, 3): 1
Closest shape is the gray trapezoid at (1, 3) with distance 1</think>

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