There are 4 shapes on a 8x8 grid. Which shape is closest to the orange 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: orange trapezoid at (7, 3)
Distance from target shape to yellow right_triangle at (4, 6): 6
Distance from target shape to pink square at (2, 7): 9
Distance from target shape to green square at (1, 0): 9
Closest shape is the yellow right_triangle at (4, 6) with distance 6</think>

<answer>(4, 6)</answer>