There are 4 shapes on a 7x7 grid. Which shape is closest to the blue trapezoid 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 trapezoid at (5, 6)
Distance from target shape to brown square at (5, 4): 2
Distance from target shape to pink trapezoid at (2, 3): 6
Distance from target shape to yellow rectangle at (1, 0): 10
Closest shape is the brown square at (5, 4) with distance 2</think>

<answer>(5, 4)</answer>