There are 4 shapes on a 10x10 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 (8, 4)
Distance from target shape to pink square at (8, 6): 2
Distance from target shape to gray trapezoid at (5, 5): 4
Distance from target shape to cyan square at (2, 6): 8
Closest shape is the pink square at (8, 6) with distance 2</think>

<answer>(8, 6)</answer>