There are 6 shapes on a 7x7 grid. Which shape is closest to the pink square 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 square at (6, 3)
Distance from target shape to purple trapezoid at (6, 0): 3
Distance from target shape to yellow right_triangle at (6, 2): 1
Distance from target shape to cyan right_triangle at (5, 2): 2
Distance from target shape to green square at (6, 4): 1
Distance from target shape to red rectangle at (2, 0): 7
Closest shape is the yellow right_triangle at (6, 2) with distance 1</think>

<answer>(6, 2)</answer>