There are 4 shapes on a 10x10 grid. Which shape is closest to the yellow 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: yellow square at (3, 4)
Distance from target shape to brown square at (2, 4): 1
Distance from target shape to blue rectangle at (5, 4): 2
Distance from target shape to gray right_triangle at (4, 4): 1
Closest shape is the brown square at (2, 4) with distance 1</think>

<answer>(2, 4)</answer>