There are 6 shapes on a 7x7 grid. Which shape is closest to the cyan rectangle 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 rectangle at (5, 1)
Distance from target shape to pink right_triangle at (6, 0): 2
Distance from target shape to blue square at (3, 5): 6
Distance from target shape to red trapezoid at (3, 1): 2
Distance from target shape to brown square at (5, 4): 3
Distance from target shape to green trapezoid at (1, 6): 9
Closest shape is the pink right_triangle at (6, 0) with distance 2</think>

<answer>(6, 0)</answer>