There are 4 shapes on a 6x6 grid. Which shape is closest to the red 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: red square at (1, 1)
Distance from target shape to orange square at (4, 5): 7
Distance from target shape to brown trapezoid at (3, 0): 3
Distance from target shape to pink right_triangle at (2, 3): 3
Closest shape is the brown trapezoid at (3, 0) with distance 3</think>

<answer>(3, 0)</answer>