There are 3 shapes on a 10x10 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 (1, 5)
Distance from target shape to brown trapezoid at (8, 3): 9
Distance from target shape to gray right_triangle at (6, 0): 10
Closest shape is the brown trapezoid at (8, 3) with distance 9</think>

<answer>(8, 3)</answer>