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

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