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

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