There are 6 shapes on a 6x6 grid. Which shape is closest to the green 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: green trapezoid at (4, 5)
Distance from target shape to purple square at (2, 3): 4
Distance from target shape to brown square at (2, 2): 5
Distance from target shape to pink square at (5, 4): 2
Distance from target shape to yellow trapezoid at (2, 4): 3
Distance from target shape to cyan rectangle at (0, 1): 8
Closest shape is the pink square at (5, 4) with distance 2</think>

<answer>(5, 4)</answer>