There are 4 shapes on a 8x8 grid. Which shape is closest to the cyan square 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 square at (3, 5)
Distance from target shape to red rectangle at (4, 0): 6
Distance from target shape to brown rectangle at (7, 0): 9
Distance from target shape to pink right_triangle at (1, 2): 5
Closest shape is the pink right_triangle at (1, 2) with distance 5</think>

<answer>(1, 2)</answer>