There are 6 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 (3, 4)
Distance from target shape to red rectangle at (1, 4): 2
Distance from target shape to brown rectangle at (6, 1): 6
Distance from target shape to yellow square at (2, 2): 3
Distance from target shape to cyan square at (5, 1): 5
Distance from target shape to pink trapezoid at (0, 3): 4
Closest shape is the red rectangle at (1, 4) with distance 2</think>

<answer>(1, 4)</answer>