There are 5 shapes on a 3x3 grid. Which shape is closest to the red 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: red rectangle at (1, 1)
Distance from target shape to cyan rectangle at (1, 0): 1
Distance from target shape to gray right_triangle at (1, 2): 1
Distance from target shape to yellow right_triangle at (2, 0): 2
Distance from target shape to orange trapezoid at (0, 1): 1
Closest shape is the cyan rectangle at (1, 0) with distance 1</think>

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