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

<answer>(6, 0)</answer>