There are 3 shapes on a 7x7 grid. Which shape is closest to the purple 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: purple right_triangle at (1, 0)
Distance from target shape to orange square at (0, 3): 4
Distance from target shape to cyan square at (2, 2): 3
Closest shape is the cyan square at (2, 2) with distance 3</think>

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