There are 6 shapes on a 7x7 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 (6, 5)
Distance from target shape to purple right_triangle at (2, 2): 7
Distance from target shape to gray square at (6, 4): 1
Distance from target shape to blue right_triangle at (4, 5): 2
Distance from target shape to orange trapezoid at (3, 0): 8
Distance from target shape to pink rectangle at (4, 4): 3
Closest shape is the gray square at (6, 4) with distance 1</think>

<answer>(6, 4)</answer>