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

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