There are 4 shapes on a 6x6 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, 1)
Distance from target shape to blue trapezoid at (5, 5): 7
Distance from target shape to gray trapezoid at (4, 2): 3
Distance from target shape to yellow right_triangle at (1, 0): 2
Closest shape is the yellow right_triangle at (1, 0) with distance 2</think>

<answer>(1, 0)</answer>