There are 5 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 (0, 0)
Distance from target shape to cyan trapezoid at (5, 4): 9
Distance from target shape to yellow rectangle at (6, 6): 12
Distance from target shape to blue square at (2, 1): 3
Distance from target shape to brown square at (6, 1): 7
Closest shape is the blue square at (2, 1) with distance 3</think>

<answer>(2, 1)</answer>