There are 2 shapes on a 8x8 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, 7)
Distance from target shape to yellow right_triangle at (1, 3): 5
Closest shape is the yellow right_triangle at (1, 3) with distance 5</think>

<answer>(1, 3)</answer>