There are 4 shapes on a 10x10 grid. Which shape is closest to the gray 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: gray rectangle at (4, 2)
Distance from target shape to pink rectangle at (9, 4): 7
Distance from target shape to brown square at (1, 1): 4
Distance from target shape to cyan right_triangle at (4, 7): 5
Closest shape is the brown square at (1, 1) with distance 4</think>

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