There are 4 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 (4, 1)
Distance from target shape to yellow square at (6, 2): 3
Distance from target shape to brown rectangle at (1, 4): 6
Distance from target shape to gray square at (2, 0): 3
Closest shape is the yellow square at (6, 2) with distance 3</think>

<answer>(6, 2)</answer>