There are 6 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 (0, 3)
Distance from target shape to orange right_triangle at (1, 1): 3
Distance from target shape to purple right_triangle at (3, 3): 3
Distance from target shape to blue trapezoid at (3, 0): 6
Distance from target shape to green trapezoid at (0, 0): 3
Distance from target shape to brown rectangle at (2, 2): 3
Closest shape is the orange right_triangle at (1, 1) with distance 3</think>

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