There are 3 shapes on a 7x7 grid. Which shape is closest to the pink rectangle in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: pink rectangle at (6, 6)
Distance from target shape to cyan square at (6, 5): 1
Distance from target shape to brown right_triangle at (6, 2): 4
Closest shape is the cyan square at (6, 5) with distance 1</think>

<answer>(6, 5)</answer>