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

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