There are 3 shapes on a 10x10 grid. Which shape is closest to the gray 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: gray square at (1, 4)
Distance from target shape to pink rectangle at (1, 2): 2
Distance from target shape to red square at (0, 6): 3
Closest shape is the pink rectangle at (1, 2) with distance 2</think>

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