There are 4 shapes on a 6x6 grid. Which shape is closest to the blue 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: blue trapezoid at (4, 4)
Distance from target shape to cyan trapezoid at (2, 4): 2
Distance from target shape to brown rectangle at (4, 3): 1
Distance from target shape to green rectangle at (5, 4): 1
Closest shape is the brown rectangle at (4, 3) with distance 1</think>

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