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 (2, 5)
Distance from target shape to orange rectangle at (2, 2): 3
Distance from target shape to pink square at (6, 1): 8
Distance from target shape to gray right_triangle at (1, 5): 1
Distance from target shape to red right_triangle at (6, 3): 6
Distance from target shape to purple trapezoid at (5, 3): 5
Closest shape is the gray right_triangle at (1, 5) with distance 1</think>

<answer>(1, 5)</answer>