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 (4, 1)
Distance from target shape to brown rectangle at (5, 4): 4
Distance from target shape to green square at (0, 1): 4
Distance from target shape to purple right_triangle at (4, 2): 1
Distance from target shape to pink trapezoid at (4, 3): 2
Distance from target shape to orange trapezoid at (5, 3): 3
Closest shape is the purple right_triangle at (4, 2) with distance 1</think>

<answer>(4, 2)</answer>