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

<answer>(2, 0)</answer>