There are 6 shapes on a 6x6 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 (0, 5)
Distance from target shape to cyan square at (4, 0): 9
Distance from target shape to brown rectangle at (5, 2): 8
Distance from target shape to blue trapezoid at (2, 1): 6
Distance from target shape to pink square at (1, 3): 3
Distance from target shape to purple rectangle at (0, 0): 5
Closest shape is the pink square at (1, 3) with distance 3</think>

<answer>(1, 3)</answer>