There are 5 shapes on a 7x7 grid. Which shape is closest to the orange 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: orange trapezoid at (1, 6)
Distance from target shape to pink square at (6, 1): 10
Distance from target shape to brown square at (5, 3): 7
Distance from target shape to green square at (5, 5): 5
Distance from target shape to blue right_triangle at (4, 1): 8
Closest shape is the green square at (5, 5) with distance 5</think>

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