There are 5 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 (2, 1)
Distance from target shape to red trapezoid at (1, 1): 1
Distance from target shape to purple right_triangle at (1, 3): 3
Distance from target shape to green rectangle at (0, 0): 3
Distance from target shape to blue right_triangle at (0, 2): 3
Closest shape is the red trapezoid at (1, 1) with distance 1</think>

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