There are 5 shapes on a 9x9 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 (0, 3)
Distance from target shape to purple square at (7, 1): 9
Distance from target shape to red right_triangle at (4, 0): 7
Distance from target shape to cyan rectangle at (5, 7): 9
Distance from target shape to yellow right_triangle at (5, 6): 8
Closest shape is the red right_triangle at (4, 0) with distance 7</think>

<answer>(4, 0)</answer>