There are 6 shapes on a 8x8 grid. Which shape is closest to the red 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: red trapezoid at (0, 3)
Distance from target shape to yellow right_triangle at (5, 2): 6
Distance from target shape to cyan right_triangle at (7, 0): 10
Distance from target shape to orange trapezoid at (7, 4): 8
Distance from target shape to gray square at (4, 3): 4
Distance from target shape to blue rectangle at (6, 4): 7
Closest shape is the gray square at (4, 3) with distance 4</think>

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