There are 5 shapes on a 8x8 grid. Which shape is closest to the cyan 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: cyan trapezoid at (4, 6)
Distance from target shape to blue right_triangle at (2, 2): 6
Distance from target shape to brown rectangle at (1, 6): 3
Distance from target shape to gray right_triangle at (3, 3): 4
Distance from target shape to green trapezoid at (5, 6): 1
Closest shape is the green trapezoid at (5, 6) with distance 1</think>

<answer>(5, 6)</answer>