There are 6 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 (3, 3)
Distance from target shape to purple square at (3, 1): 2
Distance from target shape to orange trapezoid at (4, 3): 1
Distance from target shape to yellow square at (2, 2): 2
Distance from target shape to pink right_triangle at (5, 3): 2
Distance from target shape to green right_triangle at (0, 2): 4
Closest shape is the orange trapezoid at (4, 3) with distance 1</think>

<answer>(4, 3)</answer>