There are 4 shapes on a 8x8 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 (3, 5)
Distance from target shape to cyan trapezoid at (1, 2): 5
Distance from target shape to brown right_triangle at (1, 6): 3
Distance from target shape to gray square at (1, 7): 4
Closest shape is the brown right_triangle at (1, 6) with distance 3</think>

<answer>(1, 6)</answer>