There are 3 shapes on a 6x6 grid. Which shape is closest to the blue 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: blue square at (2, 4)
Distance from target shape to green right_triangle at (2, 2): 2
Distance from target shape to brown trapezoid at (1, 0): 5
Closest shape is the green right_triangle at (2, 2) with distance 2</think>

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