There are 4 shapes on a 7x7 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 (0, 4)
Distance from target shape to cyan trapezoid at (2, 0): 6
Distance from target shape to red right_triangle at (5, 5): 6
Distance from target shape to brown trapezoid at (3, 4): 3
Closest shape is the brown trapezoid at (3, 4) with distance 3</think>

<answer>(3, 4)</answer>