There are 3 shapes on a 7x7 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 (4, 0)
Distance from target shape to pink square at (6, 3): 5
Distance from target shape to green square at (1, 5): 8
Closest shape is the pink square at (6, 3) with distance 5</think>

<answer>(6, 3)</answer>